665656632 has 96 divisors (see below), whose sum is σ = 1849348800. Its totient is φ = 216235008.

The previous prime is 665656631. The next prime is 665656637. The reversal of 665656632 is 236656566.

665656632 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 5 + 6 + 632 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665656631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 467073 + ... + 468495.

It is an arithmetic number, because the mean of its divisors is an integer number (19264050).

Almost surely, 2^665656632 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 665656632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924674400).

665656632 is an abundant number, since it is smaller than the sum of its proper divisors (1183692168).

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

665656632 is a wasteful number, since it uses less digits than its factorization.

665656632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1590 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 665656632 is about 25800.3223235680. The cubic root of 665656632 is about 873.1390684717.

The spelling of 665656632 in words is "six hundred sixty-five million, six hundred fifty-six thousand, six hundred thirty-two".