66570634064 has 20 divisors (see below), whose sum is σ = 140706113280. Its totient is φ = 30259379040.

The previous prime is 66570634019. The next prime is 66570634087. The reversal of 66570634064 is 46043607566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189120944 + ... + 189121295.

It is an arithmetic number, because the mean of its divisors is an integer number (7035305664).

Almost surely, 2^66570634064 is an apocalyptic number.

It is an amenable number.

66570634064 is an abundant number, since it is smaller than the sum of its proper divisors (74135479216).

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

66570634064 is a wasteful number, since it uses less digits than its factorization.

66570634064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378242258 (or 378242252 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 66570634064 in words is "sixty-six billion, five hundred seventy million, six hundred thirty-four thousand, sixty-four".