16515016660 has 24 divisors (see below), whose sum is σ = 34684223616. Its totient is φ = 6605494560.

The previous prime is 16515016613. The next prime is 16515016667. The reversal of 16515016660 is 6661051561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16515016667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335169 + ... + 381271.

It is an arithmetic number, because the mean of its divisors is an integer number (1445175984).

Almost surely, 2^16515016660 is an apocalyptic number.

16515016660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16515016660 is an abundant number, since it is smaller than the sum of its proper divisors (18169206956).

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

16515016660 is a wasteful number, since it uses less digits than its factorization.

16515016660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64023 (or 64021 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 16515016660 in words is "sixteen billion, five hundred fifteen million, sixteen thousand, six hundred sixty".