16665373839972 has 192 divisors, whose sum is σ = 45998563903488. Its totient is φ = 4629571200000.

The previous prime is 16665373839967. The next prime is 16665373840009. The reversal of 16665373839972 is 27993837356661.

It is a junction number, because it is equal to n+sod(n) for n = 16665373839894 and 16665373839903.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1572051472 + ... + 1572062072.

It is an arithmetic number, because the mean of its divisors is an integer number (239575853664).

Almost surely, 2^{16665373839972} is an apocalyptic number.

16665373839972 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 16665373839972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22999281951744).

16665373839972 is an abundant number, since it is smaller than the sum of its proper divisors (29333190063516).

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

16665373839972 is a wasteful number, since it uses less digits than its factorization.

16665373839972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16850 (or 16848 counting only the distinct ones).

The product of its digits is 1851776640, while the sum is 75.

The spelling of 16665373839972 in words is "sixteen trillion, six hundred sixty-five billion, three hundred seventy-three million, eight hundred thirty-nine thousand, nine hundred seventy-two".