16642665072 has 60 divisors (see below), whose sum is σ = 50810565624. Its totient is φ = 5043231360.

The previous prime is 16642665047. The next prime is 16642665073. The reversal of 16642665072 is 27056624661.

16642665072 is a `hidden beast` number, since 166 + 426 + 65 + 0 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642665073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5251783 + ... + 5254950.

Almost surely, 2^16642665072 is an apocalyptic number.

16642665072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16642665072 is an abundant number, since it is smaller than the sum of its proper divisors (34167900552).

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

16642665072 is a wasteful number, since it uses less digits than its factorization.

16642665072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506758 (or 10506749 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 16642665072 in words is "sixteen billion, six hundred forty-two million, six hundred sixty-five thousand, seventy-two".