16662818639376 has 640 divisors, whose sum is σ = 62094692352000. Its totient is φ = 4154514499584.

The previous prime is 16662818639351. The next prime is 16662818639437. The reversal of 16662818639376 is 67393681826661.

16662818639376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 357755226 + ... + 357801798.

It is an arithmetic number, because the mean of its divisors is an integer number (97022956800).

Almost surely, 2^{16662818639376} is an apocalyptic number.

16662818639376 is a gapful number since it is divisible by the number (16) 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 16662818639376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31047346176000).

16662818639376 is an abundant number, since it is smaller than the sum of its proper divisors (45431873712624).

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

16662818639376 is a wasteful number, since it uses less digits than its factorization.

16662818639376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47108 (or 47096 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 72.

The spelling of 16662818639376 in words is "sixteen trillion, six hundred sixty-two billion, eight hundred eighteen million, six hundred thirty-nine thousand, three hundred seventy-six".