666679536 has 30 divisors (see below), whose sum is σ = 1865777160. Its totient is φ = 222226464.

The previous prime is 666679523. The next prime is 666679549. The reversal of 666679536 is 635976666.

It is an interprime number because it is at equal distance from previous prime (666679523) and next prime (666679549).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2314716 + ... + 2315003.

It is an arithmetic number, because the mean of its divisors is an integer number (62192572).

Almost surely, 2^666679536 is an apocalyptic number.

It is an amenable number.

666679536 is an abundant number, since it is smaller than the sum of its proper divisors (1199097624).

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

666679536 is a wasteful number, since it uses less digits than its factorization.

666679536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629733 (or 4629724 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The square root of 666679536 is about 25820.1381870818. The cubic root of 666679536 is about 873.5860858992.

The spelling of 666679536 in words is "six hundred sixty-six million, six hundred seventy-nine thousand, five hundred thirty-six".