666315 has 48 divisors (see below), whose sum is σ = 1336608. Its totient is φ = 304128.

The previous prime is 666301. The next prime is 666329. The reversal of 666315 is 513666.

666315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666301) and next prime (666329).

666315 is an admirable number.

It is not a de Polignac number, because 666315 - 2⁷ = 666187 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9912 + ... + 9978.

It is an arithmetic number, because the mean of its divisors is an integer number (27846).

2⁶⁶⁶³¹⁵ is an apocalyptic number.

666315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

666315 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

666315 is a wasteful number, since it uses less digits than its factorization.

666315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 105 counting only the distinct ones).

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

The square root of 666315 is about 816.2812015476. The cubic root of 666315 is about 87.3426833155.

The spelling of 666315 in words is "six hundred sixty-six thousand, three hundred fifteen".