666413332 has 12 divisors (see below), whose sum is σ = 1255932916. Its totient is φ = 307575360.

The previous prime is 666413309. The next prime is 666413351. The reversal of 666413332 is 233314666.

It can be written as a sum of positive squares in 2 ways, for example, as 447491716 + 218921616 = 21154^2 + 14796^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6407769 + ... + 6407872.

Almost surely, 2^666413332 is an apocalyptic number.

It is an amenable number.

666413332 is a deficient number, since it is larger than the sum of its proper divisors (589519584).

666413332 is a wasteful number, since it uses less digits than its factorization.

666413332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815658 (or 12815656 counting only the distinct ones).

The product of its digits is 46656, while the sum is 34.

The square root of 666413332 is about 25814.9827038486. The cubic root of 666413332 is about 873.4697966092.

Adding to 666413332 its reverse (233314666), we get a palindrome (899727998).

The spelling of 666413332 in words is "six hundred sixty-six million, four hundred thirteen thousand, three hundred thirty-two".