665061260 has 24 divisors (see below), whose sum is σ = 1416302496. Its totient is φ = 262277120.

The previous prime is 665061247. The next prime is 665061277. The reversal of 665061260 is 62160566.

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 7 ways as a sum of consecutive naturals, for example, 232757 + ... + 235596.

It is an arithmetic number, because the mean of its divisors is an integer number (59012604).

Almost surely, 2^665061260 is an apocalyptic number.

It is an amenable number.

665061260 is an abundant number, since it is smaller than the sum of its proper divisors (751241236).

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

665061260 is a wasteful number, since it uses less digits than its factorization.

665061260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468433 (or 468431 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 665061260 is about 25788.7816695555. The cubic root of 665061260 is about 872.8786751547.

The spelling of 665061260 in words is "six hundred sixty-five million, sixty-one thousand, two hundred sixty".