665046960 has 80 divisors (see below), whose sum is σ = 2064138720. Its totient is φ = 177131520.

The previous prime is 665046947. The next prime is 665046973. The reversal of 665046960 is 69640566.

It is an interprime number because it is at equal distance from previous prime (665046947) and next prime (665046973).

It is a tau number, because it is divible by the number of its divisors (80).

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 in 15 ways as a sum of consecutive naturals, for example, 356430 + ... + 358290.

It is an arithmetic number, because the mean of its divisors is an integer number (25801734).

Almost surely, 2^665046960 is an apocalyptic number.

665046960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665046960 is an abundant number, since it is smaller than the sum of its proper divisors (1399091760).

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

665046960 is a wasteful number, since it uses less digits than its factorization.

665046960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3360 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 665046960 is about 25788.5044157276. The cubic root of 665046960 is about 872.8724189618.

The spelling of 665046960 in words is "six hundred sixty-five million, forty-six thousand, nine hundred sixty".