668376134 has 4 divisors (see below), whose sum is σ = 1002564204. Its totient is φ = 334188066.

The previous prime is 668376127. The next prime is 668376139. The reversal of 668376134 is 431673866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668376139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167094032 + ... + 167094035.

It is an arithmetic number, because the mean of its divisors is an integer number (250641051).

Almost surely, 2^668376134 is an apocalyptic number.

668376134 is a deficient number, since it is larger than the sum of its proper divisors (334188070).

668376134 is a wasteful number, since it uses less digits than its factorization.

668376134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334188069.

The product of its digits is 435456, while the sum is 44.

The square root of 668376134 is about 25852.9714733142. The cubic root of 668376134 is about 874.3265060663.

The spelling of 668376134 in words is "six hundred sixty-eight million, three hundred seventy-six thousand, one hundred thirty-four".