669604471780 has 48 divisors (see below), whose sum is σ = 1567247633280. Its totient is φ = 238818682368.

The previous prime is 669604471747. The next prime is 669604471841. The reversal of 669604471780 is 87174406966.

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, 51820512 + ... + 51833431.

It is an arithmetic number, because the mean of its divisors is an integer number (32650992360).

Almost surely, 2^669604471780 is an apocalyptic number.

It is an amenable number.

669604471780 is an abundant number, since it is smaller than the sum of its proper divisors (897643161500).

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

669604471780 is a wasteful number, since it uses less digits than its factorization.

669604471780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103653988 (or 103653986 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 669604471780 in words is "six hundred sixty-nine billion, six hundred four million, four hundred seventy-one thousand, seven hundred eighty".