665641163330 has 64 divisors (see below), whose sum is σ = 1413511948800. Its totient is φ = 222497022720.

The previous prime is 665641163311. The next prime is 665641163353. The reversal of 665641163330 is 33361146566.

665641163330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 632045 + ... + 1315584.

It is an arithmetic number, because the mean of its divisors is an integer number (22086124200).

Almost surely, 2^665641163330 is an apocalyptic number.

665641163330 is an abundant number, since it is smaller than the sum of its proper divisors (747870785470).

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

665641163330 is a wasteful number, since it uses less digits than its factorization.

665641163330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947899.

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 665641163330 in words is "six hundred sixty-five billion, six hundred forty-one million, one hundred sixty-three thousand, three hundred thirty".