66659267625 has 16 divisors (see below), whose sum is σ = 110921021952. Its totient is φ = 35551609200.

The previous prime is 66659267617. The next prime is 66659267641. The reversal of 66659267625 is 52676295666.

It is a happy number.

66659267625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66659267625 - 2³ = 66659267617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88878649 + ... + 88879398.

It is an arithmetic number, because the mean of its divisors is an integer number (6932563872).

Almost surely, 2^66659267625 is an apocalyptic number.

It is an amenable number.

66659267625 is a deficient number, since it is larger than the sum of its proper divisors (44261754327).

66659267625 is a wasteful number, since it uses less digits than its factorization.

66659267625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177758065 (or 177758055 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 60.

The spelling of 66659267625 in words is "sixty-six billion, six hundred fifty-nine million, two hundred sixty-seven thousand, six hundred twenty-five".