668007387 has 12 divisors (see below), whose sum is σ = 965841760. Its totient is φ = 444903408.

The previous prime is 668007341. The next prime is 668007397. The reversal of 668007387 is 783700866.

It is not a de Polignac number, because 668007387 - 2¹¹ = 668005339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668007317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26368 + ... + 45069.

Almost surely, 2^668007387 is an apocalyptic number.

668007387 is a deficient number, since it is larger than the sum of its proper divisors (297834373).

668007387 is a wasteful number, since it uses less digits than its factorization.

668007387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72482 (or 72479 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 668007387 is about 25845.8388720506. The cubic root of 668007387 is about 874.1656861483.

The spelling of 668007387 in words is "six hundred sixty-eight million, seven thousand, three hundred eighty-seven".