668960481 has 24 divisors (see below), whose sum is σ = 1047708480. Its totient is φ = 371915712.

The previous prime is 668960477. The next prime is 668960507. The reversal of 668960481 is 184069866.

It is not a de Polignac number, because 668960481 - 2² = 668960477 is a prime.

It is a super-2 number, since 2×668960481² = 895016250279502722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668960481.

It is not an unprimeable number, because it can be changed into a prime (668920481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17115 + ... + 40383.

It is an arithmetic number, because the mean of its divisors is an integer number (43654520).

Almost surely, 2^668960481 is an apocalyptic number.

It is an amenable number.

668960481 is a deficient number, since it is larger than the sum of its proper divisors (378747999).

668960481 is a wasteful number, since it uses less digits than its factorization.

668960481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23353 (or 23316 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 668960481 is about 25864.2703550670. The cubic root of 668960481 is about 874.5812335192.

The spelling of 668960481 in words is "six hundred sixty-eight million, nine hundred sixty thousand, four hundred eighty-one".