665120502 has 12 divisors (see below), whose sum is σ = 1441094460. Its totient is φ = 221706828.

The previous prime is 665120501. The next prime is 665120527. The reversal of 665120502 is 205021566.

665120502 is a `hidden beast` number, since 6 + 651 + 2 + 0 + 5 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665120501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18475552 + ... + 18475587.

It is an arithmetic number, because the mean of its divisors is an integer number (120091205).

Almost surely, 2^665120502 is an apocalyptic number.

665120502 is an abundant number, since it is smaller than the sum of its proper divisors (775973958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665120502 is a wasteful number, since it uses less digits than its factorization.

665120502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36951147 (or 36951144 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 665120502 is about 25789.9302441864. The cubic root of 665120502 is about 872.9045923376.

The spelling of 665120502 in words is "six hundred sixty-five million, one hundred twenty thousand, five hundred two".