660279312 has 360 divisors, whose sum is σ = 2408095872. Its totient is φ = 166924800.

The previous prime is 660279287. The next prime is 660279343. The reversal of 660279312 is 213972066.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3647862 + ... + 3648042.

Almost surely, 2^660279312 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 660279312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1204047936).

660279312 is an abundant number, since it is smaller than the sum of its proper divisors (1747816560).

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

660279312 is a wasteful number, since it uses less digits than its factorization.

660279312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 660279312 is about 25695.9006847396. The cubic root of 660279312 is about 870.7815727259.

It can be divided in two parts, 660 and 279312, that added together give a palindrome (279972).

The spelling of 660279312 in words is "six hundred sixty million, two hundred seventy-nine thousand, three hundred twelve".