668024887 has 4 divisors (see below), whose sum is σ = 668200896. Its totient is φ = 667848880.

The previous prime is 668024881. The next prime is 668024893. The reversal of 668024887 is 788420866.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (668024881) and next prime (668024893).

It is a cyclic number.

It is not a de Polignac number, because 668024887 - 2²³ = 659636279 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 668024887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668024881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82183 + ... + 89944.

It is an arithmetic number, because the mean of its divisors is an integer number (167050224).

Almost surely, 2^668024887 is an apocalyptic number.

668024887 is a deficient number, since it is larger than the sum of its proper divisors (176009).

668024887 is a wasteful number, since it uses less digits than its factorization.

668024887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176008.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The square root of 668024887 is about 25846.1774156257. The cubic root of 668024887 is about 874.1733196796.

The spelling of 668024887 in words is "six hundred sixty-eight million, twenty-four thousand, eight hundred eighty-seven".