666713396 has 6 divisors (see below), whose sum is σ = 1166748450. Its totient is φ = 333356696.

The previous prime is 666713339. The next prime is 666713407. The reversal of 666713396 is 693317666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 664917796 + 1795600 = 25786^2 + 1340^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666713396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83339171 + ... + 83339178.

It is an arithmetic number, because the mean of its divisors is an integer number (194458075).

Almost surely, 2^666713396 is an apocalyptic number.

It is an amenable number.

666713396 is a deficient number, since it is larger than the sum of its proper divisors (500035054).

666713396 is a wasteful number, since it uses less digits than its factorization.

666713396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166678353 (or 166678351 counting only the distinct ones).

The product of its digits is 734832, while the sum is 47.

The square root of 666713396 is about 25820.7938685084. The cubic root of 666713396 is about 873.6008751758.

The spelling of 666713396 in words is "six hundred sixty-six million, seven hundred thirteen thousand, three hundred ninety-six".