665958896 has 10 divisors (see below), whose sum is σ = 1290295392. Its totient is φ = 332979440.

The previous prime is 665958877. The next prime is 665958983. The reversal of 665958896 is 698859566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20811200 + ... + 20811231.

Almost surely, 2^665958896 is an apocalyptic number.

It is an amenable number.

665958896 is a deficient number, since it is larger than the sum of its proper divisors (624336496).

665958896 is a wasteful number, since it uses less digits than its factorization.

665958896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41622439 (or 41622433 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 62.

The square root of 665958896 is about 25806.1794150161. The cubic root of 665958896 is about 873.2712079551.

The spelling of 665958896 in words is "six hundred sixty-five million, nine hundred fifty-eight thousand, eight hundred ninety-six".