66570660693 has 12 divisors (see below), whose sum is σ = 96161388960. Its totient is φ = 44378701416.

The previous prime is 66570660661. The next prime is 66570660703. The reversal of 66570660693 is 39606607566.

66570660693 is a `hidden beast` number, since 6 + 6 + 570 + 6 + 6 + 0 + 69 + 3 = 666.

It is not a de Polignac number, because 66570660693 - 2⁵ = 66570660661 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570660193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123730 + ... + 385292.

It is an arithmetic number, because the mean of its divisors is an integer number (8013449080).

Almost surely, 2^66570660693 is an apocalyptic number.

It is an amenable number.

66570660693 is a deficient number, since it is larger than the sum of its proper divisors (29590728267).

66570660693 is a wasteful number, since it uses less digits than its factorization.

66570660693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289848 (or 289845 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 66570660693 in words is "sixty-six billion, five hundred seventy million, six hundred sixty thousand, six hundred ninety-three".