669951973801 has 16 divisors (see below), whose sum is σ = 762662770560. Its totient is φ = 582544251520.

The previous prime is 669951973751. The next prime is 669951973807. The reversal of 669951973801 is 108379159966.

It is a happy number.

It is not a de Polignac number, because 669951973801 - 2⁷ = 669951973673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669951973807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12236355 + ... + 12290983.

It is an arithmetic number, because the mean of its divisors is an integer number (47666423160).

Almost surely, 2^669951973801 is an apocalyptic number.

It is an amenable number.

669951973801 is a deficient number, since it is larger than the sum of its proper divisors (92710796759).

669951973801 is a wasteful number, since it uses less digits than its factorization.

669951973801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103136.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 669951973801 in words is "six hundred sixty-nine billion, nine hundred fifty-one million, nine hundred seventy-three thousand, eight hundred one".