669786886 has 16 divisors (see below), whose sum is σ = 1017702000. Its totient is φ = 330581088.

The previous prime is 669786883. The next prime is 669786889. The reversal of 669786886 is 688687966.

It is an interprime number because it is at equal distance from previous prime (669786883) and next prime (669786889).

It is a super-2 number, since 2×669786886² = 897228945315153992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669786883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41680 + ... + 55468.

It is an arithmetic number, because the mean of its divisors is an integer number (63606375).

Almost surely, 2^669786886 is an apocalyptic number.

669786886 is a deficient number, since it is larger than the sum of its proper divisors (347915114).

669786886 is a wasteful number, since it uses less digits than its factorization.

669786886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14103.

The product of its digits is 41803776, while the sum is 64.

The square root of 669786886 is about 25880.2412276238. The cubic root of 669786886 is about 874.9412253310.

The spelling of 669786886 in words is "six hundred sixty-nine million, seven hundred eighty-six thousand, eight hundred eighty-six".