665082660 has 48 divisors (see below), whose sum is σ = 2031527232. Its totient is φ = 161232000.

The previous prime is 665082647. The next prime is 665082661. The reversal of 665082660 is 66280566.

It is not an unprimeable number, because it can be changed into a prime (665082661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503191 + ... + 504510.

It is an arithmetic number, because the mean of its divisors is an integer number (42323484).

Almost surely, 2^665082660 is an apocalyptic number.

665082660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665082660 is an abundant number, since it is smaller than the sum of its proper divisors (1366444572).

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

665082660 is a wasteful number, since it uses less digits than its factorization.

665082660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007724 (or 1007722 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 665082660 is about 25789.1965753104. The cubic root of 665082660 is about 872.8880374016. Note that the first 3 decimals are identical.

The spelling of 665082660 in words is "six hundred sixty-five million, eighty-two thousand, six hundred sixty".