665948824 has 16 divisors (see below), whose sum is σ = 1249048800. Its totient is φ = 332869152.

The previous prime is 665948809. The next prime is 665948827. The reversal of 665948824 is 428849566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665948827) 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, 18097 + ... + 40735.

It is an arithmetic number, because the mean of its divisors is an integer number (78065550).

Almost surely, 2^665948824 is an apocalyptic number.

It is an amenable number.

665948824 is a deficient number, since it is larger than the sum of its proper divisors (583099976).

665948824 is a wasteful number, since it uses less digits than its factorization.

665948824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26322 (or 26318 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The square root of 665948824 is about 25805.9842672199. The cubic root of 665948824 is about 873.2668054652.

The spelling of 665948824 in words is "six hundred sixty-five million, nine hundred forty-eight thousand, eight hundred twenty-four".