668337402 has 32 divisors (see below), whose sum is σ = 1352520000. Its totient is φ = 220147200.

The previous prime is 668337391. The next prime is 668337403. The reversal of 668337402 is 204733866.

It is not an unprimeable number, because it can be changed into a prime (668337403) 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, 534474 + ... + 535722.

It is an arithmetic number, because the mean of its divisors is an integer number (42266250).

Almost surely, 2^668337402 is an apocalyptic number.

668337402 is an abundant number, since it is smaller than the sum of its proper divisors (684182598).

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

668337402 is a wasteful number, since it uses less digits than its factorization.

668337402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 668337402 is about 25852.2223802906. Note that the first 3 decimals coincide. The cubic root of 668337402 is about 874.3096168395.

The spelling of 668337402 in words is "six hundred sixty-eight million, three hundred thirty-seven thousand, four hundred two".