665232366204 has 144 divisors (see below), whose sum is σ = 1963338144768. Its totient is φ = 185959234944.

The previous prime is 665232366193. The next prime is 665232366233. The reversal of 665232366204 is 402663232566.

665232366204 is a `hidden beast` number, since 6 + 6 + 52 + 32 + 366 + 204 = 666.

It is a super-3 number, since 3×665232366204³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 665232366204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43068907 + ... + 43084349.

It is an arithmetic number, because the mean of its divisors is an integer number (13634292672).

Almost surely, 2^665232366204 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 665232366204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981669072384).

665232366204 is an abundant number, since it is smaller than the sum of its proper divisors (1298105778564).

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

665232366204 is a wasteful number, since it uses less digits than its factorization.

665232366204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19144 (or 19139 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 45.

The spelling of 665232366204 in words is "six hundred sixty-five billion, two hundred thirty-two million, three hundred sixty-six thousand, two hundred four".