664707768234 has 32 divisors (see below), whose sum is σ = 1342465173504. Its totient is φ = 219394774320.

The previous prime is 664707768223. The next prime is 664707768247. The reversal of 664707768234 is 432867707466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6339979 + ... + 6443969.

It is an arithmetic number, because the mean of its divisors is an integer number (41952036672).

Almost surely, 2^664707768234 is an apocalyptic number.

664707768234 is an abundant number, since it is smaller than the sum of its proper divisors (677757405270).

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

664707768234 is a wasteful number, since it uses less digits than its factorization.

664707768234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114442.

The product of its (nonzero) digits is 56899584, while the sum is 60.

The spelling of 664707768234 in words is "six hundred sixty-four billion, seven hundred seven million, seven hundred sixty-eight thousand, two hundred thirty-four".