665571472104 has 256 divisors, whose sum is σ = 2130891079680. Its totient is φ = 168208024320.

The previous prime is 665571472067. The next prime is 665571472127. The reversal of 665571472104 is 401274175566.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20883109 + ... + 20914955.

It is an arithmetic number, because the mean of its divisors is an integer number (8323793280).

Almost surely, 2^665571472104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665571472104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1065445539840).

665571472104 is an abundant number, since it is smaller than the sum of its proper divisors (1465319607576).

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

665571472104 is a wasteful number, since it uses less digits than its factorization.

665571472104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32180 (or 32176 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 665571472104 in words is "six hundred sixty-five billion, five hundred seventy-one million, four hundred seventy-two thousand, one hundred four".