669046518480 has 80 divisors (see below), whose sum is σ = 2122277826240. Its totient is φ = 174263276544.

The previous prime is 669046518461. The next prime is 669046518499. The reversal of 669046518480 is 84815640966.

669046518480 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 an interprime number because it is at equal distance from previous prime (669046518461) and next prime (669046518499).

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 669046518480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32404725 + ... + 32425364.

It is an arithmetic number, because the mean of its divisors is an integer number (26528472828).

Almost surely, 2^669046518480 is an apocalyptic number.

669046518480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669046518480 is an abundant number, since it is smaller than the sum of its proper divisors (1453231307760).

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

669046518480 is a wasteful number, since it uses less digits than its factorization.

669046518480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64830148 (or 64830142 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 669046518480 in words is "six hundred sixty-nine billion, forty-six million, five hundred eighteen thousand, four hundred eighty".