666579312 has 180 divisors, whose sum is σ = 2201327856. Its totient is φ = 184343040.

The previous prime is 666579289. The next prime is 666579341. The reversal of 666579312 is 213975666.

Its product of digits (408240) is a multiple of the sum of its prime divisors (180).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5248593 + ... + 5248719.

Almost surely, 2^666579312 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 666579312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100663928).

666579312 is an abundant number, since it is smaller than the sum of its proper divisors (1534748544).

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

666579312 is a wasteful number, since it uses less digits than its factorization.

666579312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 180 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 666579312 is about 25818.1973034525. The cubic root of 666579312 is about 873.5423074045.

It can be divided in two parts, 66 and 6579312, that added together give a triangular number (6579378 = T₃₆₂₇).

The spelling of 666579312 in words is "six hundred sixty-six million, five hundred seventy-nine thousand, three hundred twelve".