665425472 has 28 divisors (see below), whose sum is σ = 1321856640. Its totient is φ = 332359296.

The previous prime is 665425469. The next prime is 665425487. The reversal of 665425472 is 274524566.

It is a super-3 number, since 3×665425472³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61493 + ... + 71499.

Almost surely, 2^665425472 is an apocalyptic number.

It is an amenable number.

665425472 is a deficient number, since it is larger than the sum of its proper divisors (656431168).

665425472 is a wasteful number, since it uses less digits than its factorization.

665425472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058 (or 11048 counting only the distinct ones).

The product of its digits is 403200, while the sum is 41.

The square root of 665425472 is about 25795.8421455862. The cubic root of 665425472 is about 873.0379862293.

The spelling of 665425472 in words is "six hundred sixty-five million, four hundred twenty-five thousand, four hundred seventy-two".