669959442186 has 16 divisors (see below), whose sum is σ = 1352441492064. Its totient is φ = 221232712784.

The previous prime is 669959442169. The next prime is 669959442203. The reversal of 669959442186 is 681244959966.

It is an interprime number because it is at equal distance from previous prime (669959442169) and next prime (669959442203).

It is a self number, because there is not a number n which added to its sum of digits gives 669959442186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521774625 + ... + 521775908.

It is an arithmetic number, because the mean of its divisors is an integer number (84527593254).

Almost surely, 2^669959442186 is an apocalyptic number.

669959442186 is an abundant number, since it is smaller than the sum of its proper divisors (682482049878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669959442186 is a wasteful number, since it uses less digits than its factorization.

669959442186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043550645.

The product of its digits is 201553920, while the sum is 69.

The spelling of 669959442186 in words is "six hundred sixty-nine billion, nine hundred fifty-nine million, four hundred forty-two thousand, one hundred eighty-six".