668442624262 has 32 divisors (see below), whose sum is σ = 1213570109952. Its totient is φ = 269930098944.

The previous prime is 668442624259. The next prime is 668442624263. The reversal of 668442624262 is 262426244866.

It is a super-2 number, since 2×668442624262² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668442624263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15470283 + ... + 15513430.

It is an arithmetic number, because the mean of its divisors is an integer number (37924065936).

Almost surely, 2^668442624262 is an apocalyptic number.

668442624262 is a deficient number, since it is larger than the sum of its proper divisors (545127485690).

668442624262 is a wasteful number, since it uses less digits than its factorization.

668442624262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30983812.

The product of its digits is 10616832, while the sum is 52.

The spelling of 668442624262 in words is "six hundred sixty-eight billion, four hundred forty-two million, six hundred twenty-four thousand, two hundred sixty-two".