669805334576 has 80 divisors (see below), whose sum is σ = 1562228582400. Its totient is φ = 277799376960.

The previous prime is 669805334537. The next prime is 669805334599. The reversal of 669805334576 is 675433508966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1798406 + ... + 2138661.

It is an arithmetic number, because the mean of its divisors is an integer number (19527857280).

Almost surely, 2^669805334576 is an apocalyptic number.

It is an amenable number.

669805334576 is an abundant number, since it is smaller than the sum of its proper divisors (892423247824).

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

669805334576 is a wasteful number, since it uses less digits than its factorization.

669805334576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937127 (or 3937107 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 62.

The spelling of 669805334576 in words is "six hundred sixty-nine billion, eight hundred five million, three hundred thirty-four thousand, five hundred seventy-six".