668052427 has 24 divisors (see below), whose sum is σ = 803551344. Its totient is φ = 553355712.

The previous prime is 668052367. The next prime is 668052443. The reversal of 668052427 is 724250866.

It is not a de Polignac number, because 668052427 - 2²⁷ = 533834699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668052427.

It is not an unprimeable number, because it can be changed into a prime (668053427) 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, 283468 + ... + 285814.

It is an arithmetic number, because the mean of its divisors is an integer number (33481306).

Almost surely, 2^668052427 is an apocalyptic number.

668052427 is a deficient number, since it is larger than the sum of its proper divisors (135498917).

668052427 is a wasteful number, since it uses less digits than its factorization.

668052427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 668052427 is about 25846.7101775062. The cubic root of 668052427 is about 874.1853324069.

The spelling of 668052427 in words is "six hundred sixty-eight million, fifty-two thousand, four hundred twenty-seven".