16518507966 has 12 divisors (see below), whose sum is σ = 35790100632. Its totient is φ = 5506169316.

The previous prime is 16518507961. The next prime is 16518507979. The reversal of 16518507966 is 66970581561.

16518507966 is a `hidden beast` number, since 1 + 6 + 518 + 50 + 79 + 6 + 6 = 666.

It is a super-2 number, since 2×16518507966² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16518507961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458847426 + ... + 458847461.

It is an arithmetic number, because the mean of its divisors is an integer number (2982508386).

Almost surely, 2^16518507966 is an apocalyptic number.

16518507966 is an abundant number, since it is smaller than the sum of its proper divisors (19271592666).

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

16518507966 is a wasteful number, since it uses less digits than its factorization.

16518507966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917694895 (or 917694892 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 16518507966 in words is "sixteen billion, five hundred eighteen million, five hundred seven thousand, nine hundred sixty-six".