665232372 has 192 divisors, whose sum is σ = 2105671680. Its totient is φ = 177292800.

The previous prime is 665232329. The next prime is 665232391. The reversal of 665232372 is 273232566.

It is a happy number.

665232372 is a `hidden beast` number, since 66 + 523 + 2 + 3 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2454597 + ... + 2454867.

It is an arithmetic number, because the mean of its divisors is an integer number (10967040).

Almost surely, 2^665232372 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 665232372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052835840).

665232372 is an abundant number, since it is smaller than the sum of its proper divisors (1440439308).

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

665232372 is a wasteful number, since it uses less digits than its factorization.

665232372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 491 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 665232372 is about 25792.0990227628. The cubic root of 665232372 is about 872.9535290151.

The spelling of 665232372 in words is "six hundred sixty-five million, two hundred thirty-two thousand, three hundred seventy-two".