66124665216 has 96 divisors (see below), whose sum is σ = 194705888520. Its totient is φ = 21528944640.

The previous prime is 66124665209. The next prime is 66124665239. The reversal of 66124665216 is 61256642166.

66124665216 is a `hidden beast` number, since 6 + 61 + 2 + 4 + 66 + 521 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 617905 + ... + 716976.

Almost surely, 2^66124665216 is an apocalyptic number.

It is an amenable number.

66124665216 is an abundant number, since it is smaller than the sum of its proper divisors (128581223304).

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

66124665216 is a wasteful number, since it uses less digits than its factorization.

66124665216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334944 (or 1334929 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 66124665216 in words is "sixty-six billion, one hundred twenty-four million, six hundred sixty-five thousand, two hundred sixteen".