668146402 has 16 divisors (see below), whose sum is σ = 1249520832. Its totient is φ = 260316720.

The previous prime is 668146357. The next prime is 668146403. The reversal of 668146402 is 204641866.

It is a super-2 number, since 2×668146402² = 892839229011091208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668146403) 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, 2169153 + ... + 2169460.

It is an arithmetic number, because the mean of its divisors is an integer number (78095052).

Almost surely, 2^668146402 is an apocalyptic number.

668146402 is a deficient number, since it is larger than the sum of its proper divisors (581374430).

668146402 is a wasteful number, since it uses less digits than its factorization.

668146402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338633.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 668146402 is about 25848.5280431981. The cubic root of 668146402 is about 874.2263210636.

The spelling of 668146402 in words is "six hundred sixty-eight million, one hundred forty-six thousand, four hundred two".