666316258 has 8 divisors (see below), whose sum is σ = 1058267052. Its totient is φ = 313560576.

The previous prime is 666316253. The next prime is 666316271. The reversal of 666316258 is 852613666.

It can be written as a sum of positive squares in 2 ways, for example, as 656538129 + 9778129 = 25623^2 + 3127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (666316253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9798735 + ... + 9798802.

Almost surely, 2^666316258 is an apocalyptic number.

666316258 is a deficient number, since it is larger than the sum of its proper divisors (391950794).

666316258 is a wasteful number, since it uses less digits than its factorization.

666316258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597556.

The product of its digits is 311040, while the sum is 43.

The square root of 666316258 is about 25813.1024481754. The cubic root of 666316258 is about 873.4273828296.

The spelling of 666316258 in words is "six hundred sixty-six million, three hundred sixteen thousand, two hundred fifty-eight".