665002636836 has 24 divisors (see below), whose sum is σ = 1551938181024. Its totient is φ = 221629636800.

The previous prime is 665002636819. The next prime is 665002636849. The reversal of 665002636836 is 638636200566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4665465 + ... + 4805888.

It is an arithmetic number, because the mean of its divisors is an integer number (64664090876).

Almost surely, 2^665002636836 is an apocalyptic number.

It is an amenable number.

665002636836 is an abundant number, since it is smaller than the sum of its proper divisors (886935544188).

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

665002636836 is a wasteful number, since it uses less digits than its factorization.

665002636836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477211 (or 9477209 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 665002636836 in words is "six hundred sixty-five billion, two million, six hundred thirty-six thousand, eight hundred thirty-six".