315666 has 48 divisors (see below), whose sum is σ = 786240. Its totient is φ = 90720.

The previous prime is 315643. The next prime is 315671. The reversal of 315666 is 666513.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (3240) is a multiple of the sum of its prime divisors (108).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4411 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2³¹⁵⁶⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393120).

315666 is an abundant number, since it is smaller than the sum of its proper divisors (470574).

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

315666 is a wasteful number, since it uses less digits than its factorization.

315666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 108 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 315666 is about 561.8416146923. The cubic root of 315666 is about 68.0888400532.

The spelling of 315666 in words is "three hundred fifteen thousand, six hundred sixty-six".