669220566424 has 32 divisors (see below), whose sum is σ = 1374413443200. Its totient is φ = 304067760640.

The previous prime is 669220566397. The next prime is 669220566439. The reversal of 669220566424 is 424665022966.

It is a super-2 number, since 2×669220566424² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84836392 + ... + 84844279.

It is an arithmetic number, because the mean of its divisors is an integer number (42950420100).

Almost surely, 2^669220566424 is an apocalyptic number.

It is an amenable number.

669220566424 is an abundant number, since it is smaller than the sum of its proper divisors (705192876776).

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

669220566424 is a wasteful number, since it uses less digits than its factorization.

669220566424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169680723 (or 169680719 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 669220566424 in words is "six hundred sixty-nine billion, two hundred twenty million, five hundred sixty-six thousand, four hundred twenty-four".