664860307434 has 16 divisors (see below), whose sum is σ = 1329779674080. Its totient is φ = 221610259280.

The previous prime is 664860307379. The next prime is 664860307453. The reversal of 664860307434 is 434703068466.

It is a Curzon 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, 2313777 + ... + 2585204.

It is an arithmetic number, because the mean of its divisors is an integer number (83111229630).

Almost surely, 2^664860307434 is an apocalyptic number.

664860307434 is an abundant number, since it is smaller than the sum of its proper divisors (664919366646).

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

664860307434 is a wasteful number, since it uses less digits than its factorization.

664860307434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921605.

The product of its (nonzero) digits is 6967296, while the sum is 51.

The spelling of 664860307434 in words is "six hundred sixty-four billion, eight hundred sixty million, three hundred seven thousand, four hundred thirty-four".