66604626013 has 32 divisors (see below), whose sum is σ = 71319514112. Its totient is φ = 62096025600.

The previous prime is 66604626007. The next prime is 66604626029. The reversal of 66604626013 is 31062640666.

It is not a de Polignac number, because 66604626013 - 2⁵ = 66604625981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604626113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48228583 + ... + 48229963.

It is an arithmetic number, because the mean of its divisors is an integer number (2228734816).

Almost surely, 2^66604626013 is an apocalyptic number.

It is an amenable number.

66604626013 is a deficient number, since it is larger than the sum of its proper divisors (4714888099).

66604626013 is a wasteful number, since it uses less digits than its factorization.

66604626013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 66604626013 in words is "sixty-six billion, six hundred four million, six hundred twenty-six thousand, thirteen".