665532504 has 256 divisors, whose sum is σ = 2325120000. Its totient is φ = 175271040.

The previous prime is 665532499. The next prime is 665532547. The reversal of 665532504 is 405235566.

It is a happy number.

665532504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 962799 + ... + 963489.

It is an arithmetic number, because the mean of its divisors is an integer number (9082500).

Almost surely, 2^665532504 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 665532504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162560000).

665532504 is an abundant number, since it is smaller than the sum of its proper divisors (1659587496).

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

665532504 is a wasteful number, since it uses less digits than its factorization.

665532504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 665532504 is about 25797.9166600716. The cubic root of 665532504 is about 873.0847923687.

The spelling of 665532504 in words is "six hundred sixty-five million, five hundred thirty-two thousand, five hundred four".