66796875 has 54 divisors (see below), whose sum is σ = 126953060. Its totient is φ = 33750000.

The previous prime is 66796843. The next prime is 66796957. The reversal of 66796875 is 57869766.

It is a happy number.

It is not a de Polignac number, because 66796875 - 2⁵ = 66796843 is a prime.

Its product of digits (3810240) is a multiple of the sum of its prime divisors (27).

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 3515616 + ... + 3515634.

Almost surely, 2^66796875 is an apocalyptic number.

66796875 is a deficient number, since it is larger than the sum of its proper divisors (60156185).

66796875 is an frugal number, since it uses more digits than its factorization.

66796875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 27 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 66796875 is about 8172.9355191388. The cubic root of 66796875 is about 405.7439458212.

The spelling of 66796875 in words is "sixty-six million, seven hundred ninety-six thousand, eight hundred seventy-five".