668871720234 has 48 divisors (see below), whose sum is σ = 1469988336960. Its totient is φ = 219763944960.

The previous prime is 668871720221. The next prime is 668871720241. The reversal of 668871720234 is 432027178866.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5420329 + ... + 5542355.

It is an arithmetic number, because the mean of its divisors is an integer number (30624757020).

Almost surely, 2^668871720234 is an apocalyptic number.

668871720234 is an abundant number, since it is smaller than the sum of its proper divisors (801116616726).

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

668871720234 is a wasteful number, since it uses less digits than its factorization.

668871720234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126395 (or 126392 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 668871720234 in words is "six hundred sixty-eight billion, eight hundred seventy-one million, seven hundred twenty thousand, two hundred thirty-four".