668518502034 has 16 divisors (see below), whose sum is σ = 1340371265760. Its totient is φ = 222283790400.

The previous prime is 668518502033. The next prime is 668518502083. The reversal of 668518502034 is 430205815866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668518502033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138924964 + ... + 138929775.

It is an arithmetic number, because the mean of its divisors is an integer number (83773204110).

Almost surely, 2^668518502034 is an apocalyptic number.

668518502034 is an abundant number, since it is smaller than the sum of its proper divisors (671852763726).

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

668518502034 is a wasteful number, since it uses less digits than its factorization.

668518502034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277855145.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 668518502034 in words is "six hundred sixty-eight billion, five hundred eighteen million, five hundred two thousand, thirty-four".