66951110916 has 36 divisors (see below), whose sum is σ = 169245379212. Its totient is φ = 22316001984.

The previous prime is 66951110881. The next prime is 66951110921. The reversal of 66951110916 is 61901115966.

It can be written as a sum of positive squares in 2 ways, for example, as 24000206400 + 42950904516 = 154920^2 + 207246^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1526850 + ... + 1570086.

Almost surely, 2^66951110916 is an apocalyptic number.

It is an amenable number.

66951110916 is an abundant number, since it is smaller than the sum of its proper divisors (102294268296).

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

66951110916 is a wasteful number, since it uses less digits than its factorization.

66951110916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86260 (or 86255 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 66951110916 in words is "sixty-six billion, nine hundred fifty-one million, one hundred ten thousand, nine hundred sixteen".