666315232 has 48 divisors (see below), whose sum is σ = 1447210800. Its totient is φ = 299453440.

The previous prime is 666315227. The next prime is 666315239. The reversal of 666315232 is 232513666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666315239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20694 + ... + 41962.

It is an arithmetic number, because the mean of its divisors is an integer number (30150225).

Almost surely, 2^666315232 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 666315232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723605400).

666315232 is an abundant number, since it is smaller than the sum of its proper divisors (780895568).

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

666315232 is a wasteful number, since it uses less digits than its factorization.

666315232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21379 (or 21371 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 666315232 is about 25813.0825745396. The cubic root of 666315232 is about 873.4269345255.

Adding to 666315232 its reverse (232513666), we get a palindrome (898828898).

The spelling of 666315232 in words is "six hundred sixty-six million, three hundred fifteen thousand, two hundred thirty-two".