66776925 has 24 divisors (see below), whose sum is σ = 116217760. Its totient is φ = 33739200.

The previous prime is 66776923. The next prime is 66776939. The reversal of 66776925 is 52967766.

It is not a de Polignac number, because 66776925 - 2¹ = 66776923 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66776921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22006 + ... + 24855.

Almost surely, 2^66776925 is an apocalyptic number.

It is an amenable number.

66776925 is a deficient number, since it is larger than the sum of its proper divisors (49440835).

66776925 is a wasteful number, since it uses less digits than its factorization.

66776925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46893 (or 46888 counting only the distinct ones).

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

The square root of 66776925 is about 8171.7149362909. The cubic root of 66776925 is about 405.7035477351.

The spelling of 66776925 in words is "sixty-six million, seven hundred seventy-six thousand, nine hundred twenty-five".