669026918904 has 64 divisors (see below), whose sum is σ = 1714145932800. Its totient is φ = 217533179136.

The previous prime is 669026918893. The next prime is 669026918909. The reversal of 669026918904 is 409819620966.

669026918904 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×669026918904² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669026918909) 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, 1968309 + ... + 2283044.

It is an arithmetic number, because the mean of its divisors is an integer number (26783530200).

Almost surely, 2^669026918904 is an apocalyptic number.

It is an amenable number.

669026918904 is an abundant number, since it is smaller than the sum of its proper divisors (1045119013896).

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

669026918904 is a wasteful number, since it uses less digits than its factorization.

669026918904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251524 (or 4251520 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 669026918904 in words is "six hundred sixty-nine billion, twenty-six million, nine hundred eighteen thousand, nine hundred four".