665464163020 has 12 divisors (see below), whose sum is σ = 1397474742384. Its totient is φ = 266185665200.

The previous prime is 665464162997. The next prime is 665464163029. The reversal of 665464163020 is 20361464566.

It is not an unprimeable number, because it can be changed into a prime (665464163029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16636604056 + ... + 16636604095.

It is an arithmetic number, because the mean of its divisors is an integer number (116456228532).

Almost surely, 2^665464163020 is an apocalyptic number.

It is an amenable number.

665464163020 is an abundant number, since it is smaller than the sum of its proper divisors (732010579364).

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

665464163020 is a wasteful number, since it uses less digits than its factorization.

665464163020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33273208160 (or 33273208158 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 665464163020 in words is "six hundred sixty-five billion, four hundred sixty-four million, one hundred sixty-three thousand, twenty".