669629493340 has 24 divisors (see below), whose sum is σ = 1411410958272. Its totient is φ = 266863412160.

The previous prime is 669629493329. The next prime is 669629493371. The reversal of 669629493340 is 43394926966.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61768519 + ... + 61779358.

It is an arithmetic number, because the mean of its divisors is an integer number (58808789928).

Almost surely, 2^669629493340 is an apocalyptic number.

It is an amenable number.

669629493340 is an abundant number, since it is smaller than the sum of its proper divisors (741781464932).

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

669629493340 is a wasteful number, since it uses less digits than its factorization.

669629493340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123548157 (or 123548155 counting only the distinct ones).

The product of its (nonzero) digits is 45349632, while the sum is 61.

The spelling of 669629493340 in words is "six hundred sixty-nine billion, six hundred twenty-nine million, four hundred ninety-three thousand, three hundred forty".