668134142 has 32 divisors (see below), whose sum is σ = 1091059200. Its totient is φ = 305030880.

The previous prime is 668134141. The next prime is 668134163. The reversal of 668134142 is 241431866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668134141) 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, 1360517 + ... + 1361007.

It is an arithmetic number, because the mean of its divisors is an integer number (34095600).

Almost surely, 2^668134142 is an apocalyptic number.

668134142 is a deficient number, since it is larger than the sum of its proper divisors (422925058).

668134142 is a wasteful number, since it uses less digits than its factorization.

668134142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its digits is 27648, while the sum is 35.

The square root of 668134142 is about 25848.2908912756. The cubic root of 668134142 is about 874.2209738921.

The spelling of 668134142 in words is "six hundred sixty-eight million, one hundred thirty-four thousand, one hundred forty-two".