16667321755392 has 432 divisors, whose sum is σ = 61188766958592. Its totient is φ = 4237062266880.

The previous prime is 16667321755391. The next prime is 16667321755393. The reversal of 16667321755392 is 29355712376661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16667321755391) and next prime (16667321755393).

It is a super-2 number, since 2×16667321755392² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16667321755391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7338718 + ... + 9337634.

It is an arithmetic number, because the mean of its divisors is an integer number (141640664256).

Almost surely, 2^{16667321755392} is an apocalyptic number.

16667321755392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16667321755392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30594383479296).

16667321755392 is an abundant number, since it is smaller than the sum of its proper divisors (44521445203200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16667321755392 is a wasteful number, since it uses less digits than its factorization.

16667321755392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999004 (or 1998987 counting only the distinct ones).

The product of its digits is 85730400, while the sum is 63.

The spelling of 16667321755392 in words is "sixteen trillion, six hundred sixty-seven billion, three hundred twenty-one million, seven hundred fifty-five thousand, three hundred ninety-two".