315440666 has 8 divisors (see below), whose sum is σ = 473362164. Its totient is φ = 157653280.

The previous prime is 315440663. The next prime is 315440681. The reversal of 315440666 is 666044513.

It can be written as a sum of positive squares in 2 ways, for example, as 279859441 + 35581225 = 16729^2 + 5965^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (315440663) 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, 27425 + ... + 37188.

Almost surely, 2^315440666 is an apocalyptic number.

315440666 is a deficient number, since it is larger than the sum of its proper divisors (157921498).

315440666 is a wasteful number, since it uses less digits than its factorization.

315440666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67056.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 315440666 is about 17760.6493687590. The cubic root of 315440666 is about 680.7263475721.

The spelling of 315440666 in words is "three hundred fifteen million, four hundred forty thousand, six hundred sixty-six".