665008125 has 80 divisors (see below), whose sum is σ = 1212811776. Its totient is φ = 322560000.

The previous prime is 665008093. The next prime is 665008129. The reversal of 665008125 is 521800566.

It is not a de Polignac number, because 665008125 - 2⁵ = 665008093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665008129) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 987789 + ... + 988461.

Almost surely, 2^665008125 is an apocalyptic number.

It is an amenable number.

665008125 is a deficient number, since it is larger than the sum of its proper divisors (547803651).

665008125 is a wasteful number, since it uses less digits than its factorization.

665008125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 665008125 is about 25787.7514529670. The cubic root of 665008125 is about 872.8554283520.

The spelling of 665008125 in words is "six hundred sixty-five million, eight thousand, one hundred twenty-five".