665868796 has 24 divisors (see below), whose sum is σ = 1173690000. Its totient is φ = 330537984.

The previous prime is 665868779. The next prime is 665868799. The reversal of 665868796 is 697868566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665868799) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 410475 + ... + 412093.

It is an arithmetic number, because the mean of its divisors is an integer number (48903750).

Almost surely, 2^665868796 is an apocalyptic number.

It is an amenable number.

665868796 is a deficient number, since it is larger than the sum of its proper divisors (507821204).

665868796 is a wasteful number, since it uses less digits than its factorization.

665868796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301 (or 2299 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 61.

The square root of 665868796 is about 25804.4336500532. The cubic root of 665868796 is about 873.2318235001.

The spelling of 665868796 in words is "six hundred sixty-five million, eight hundred sixty-eight thousand, seven hundred ninety-six".