668965242 has 32 divisors (see below), whose sum is σ = 1460675520. Its totient is φ = 202561920.

The previous prime is 668965229. The next prime is 668965259. The reversal of 668965242 is 242569866.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 668965191 and 668965200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107118 + ... + 113190.

It is an arithmetic number, because the mean of its divisors is an integer number (45646110).

Almost surely, 2^668965242 is an apocalyptic number.

668965242 is an abundant number, since it is smaller than the sum of its proper divisors (791710278).

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

668965242 is a wasteful number, since it uses less digits than its factorization.

668965242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7758.

The product of its digits is 1244160, while the sum is 48.

The square root of 668965242 is about 25864.3623930690. The cubic root of 668965242 is about 874.5833083161.

The spelling of 668965242 in words is "six hundred sixty-eight million, nine hundred sixty-five thousand, two hundred forty-two".