66976725 has 12 divisors (see below), whose sum is σ = 110734976. Its totient is φ = 35720880.

The previous prime is 66976717. The next prime is 66976769. The reversal of 66976725 is 52767966.

It is not a de Polignac number, because 66976725 - 2³ = 66976717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446437 + ... + 446586.

Almost surely, 2^66976725 is an apocalyptic number.

It is an amenable number.

66976725 is a deficient number, since it is larger than the sum of its proper divisors (43758251).

66976725 is a wasteful number, since it uses less digits than its factorization.

66976725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893036 (or 893031 counting only the distinct ones).

The product of its digits is 952560, while the sum is 48.

The square root of 66976725 is about 8183.9309014678. The cubic root of 66976725 is about 406.1077734870.

The spelling of 66976725 in words is "sixty-six million, nine hundred seventy-six thousand, seven hundred twenty-five".