665248992 has 24 divisors (see below), whose sum is σ = 1746278856. Its totient is φ = 221749632.

The previous prime is 665248979. The next prime is 665248999. The reversal of 665248992 is 299842566.

665248992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665248999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3464743 + ... + 3464934.

It is an arithmetic number, because the mean of its divisors is an integer number (72761619).

Almost surely, 2^665248992 is an apocalyptic number.

It is an amenable number.

665248992 is an abundant number, since it is smaller than the sum of its proper divisors (1081029864).

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

665248992 is a wasteful number, since it uses less digits than its factorization.

665248992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929690 (or 6929682 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 665248992 is about 25792.4212124415. The cubic root of 665248992 is about 872.9607988391.

The spelling of 665248992 in words is "six hundred sixty-five million, two hundred forty-eight thousand, nine hundred ninety-two".