66570664511 has 8 divisors (see below), whose sum is σ = 71970443664. Its totient is φ = 61210736640.

The previous prime is 66570664507. The next prime is 66570664541. The reversal of 66570664511 is 11546607566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66570664511 - 2² = 66570664507 is a prime.

It is a super-2 number, since 2×66570664511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570664541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9959345 + ... + 9966026.

It is an arithmetic number, because the mean of its divisors is an integer number (8996305458).

Almost surely, 2^66570664511 is an apocalyptic number.

66570664511 is a deficient number, since it is larger than the sum of its proper divisors (5399779153).

66570664511 is a wasteful number, since it uses less digits than its factorization.

66570664511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19925641.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 66570664511 in words is "sixty-six billion, five hundred seventy million, six hundred sixty-four thousand, five hundred eleven".