66535805196 has 72 divisors (see below), whose sum is σ = 202331118080. Its totient is φ = 18009690336.

The previous prime is 66535805183. The next prime is 66535805221. The reversal of 66535805196 is 69150853566.

It is a happy number.

66535805196 is a `hidden beast` number, since 6 + 6 + 5 + 3 + 580 + 51 + 9 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6943396 + ... + 6952971.

Almost surely, 2^66535805196 is an apocalyptic number.

It is an amenable number.

66535805196 is an abundant number, since it is smaller than the sum of its proper divisors (135795312884).

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

66535805196 is a wasteful number, since it uses less digits than its factorization.

66535805196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13896403 (or 13896398 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 66535805196 in words is "sixty-six billion, five hundred thirty-five million, eight hundred five thousand, one hundred ninety-six".