665679652 has 24 divisors (see below), whose sum is σ = 1271793600. Its totient is φ = 302355360.

The previous prime is 665679643. The next prime is 665679653. The reversal of 665679652 is 256976566.

It is a super-2 number, since 2×665679652² = 886258798173682208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665679652.

It is not an unprimeable number, because it can be changed into a prime (665679653) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63273 + ... + 73039.

It is an arithmetic number, because the mean of its divisors is an integer number (52991400).

Almost surely, 2^665679652 is an apocalyptic number.

It is an amenable number.

665679652 is a deficient number, since it is larger than the sum of its proper divisors (606113948).

665679652 is a wasteful number, since it uses less digits than its factorization.

665679652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331 (or 11329 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 52.

The square root of 665679652 is about 25800.7684381687. The cubic root of 665679652 is about 873.1491334354.

The spelling of 665679652 in words is "six hundred sixty-five million, six hundred seventy-nine thousand, six hundred fifty-two".