669814814382 has 32 divisors (see below), whose sum is σ = 1597570739712. Its totient is φ = 183054980064.

The previous prime is 669814814369. The next prime is 669814814399. The reversal of 669814814382 is 283418418966.

It is a happy number.

It is a super-2 number, since 2×669814814382² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 346694073 + ... + 346696004.

It is an arithmetic number, because the mean of its divisors is an integer number (49924085616).

Almost surely, 2^669814814382 is an apocalyptic number.

669814814382 is an abundant number, since it is smaller than the sum of its proper divisors (927755925330).

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

669814814382 is a wasteful number, since it uses less digits than its factorization.

669814814382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693390112.

The product of its digits is 15925248, while the sum is 60.

The spelling of 669814814382 in words is "six hundred sixty-nine billion, eight hundred fourteen million, eight hundred fourteen thousand, three hundred eighty-two".