668960410 has 12 divisors (see below), whose sum is σ = 1204275978. Its totient is φ = 267551448.

The previous prime is 668960399. The next prime is 668960419. The reversal of 668960410 is 14069866.

It can be written as a sum of positive squares in only one way, i.e., 602064369 + 66896041 = 24537^2 + 8179^2 .

It is not an unprimeable number, because it can be changed into a prime (668960419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77701 + ... + 85879.

Almost surely, 2^668960410 is an apocalyptic number.

668960410 is a deficient number, since it is larger than the sum of its proper divisors (535315568).

668960410 is an frugal number, since it uses more digits than its factorization.

668960410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16365 (or 8186 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 668960410 is about 25864.2689825172. The cubic root of 668960410 is about 874.5812025780.

Multiplying 668960410 by its sum of digits (40), we get a square (26758416400 = 163580²).

The spelling of 668960410 in words is "six hundred sixty-eight million, nine hundred sixty thousand, four hundred ten".