665243315 has 16 divisors (see below), whose sum is σ = 873857376. Its totient is φ = 482150400.

The previous prime is 665243309. The next prime is 665243351. The reversal of 665243315 is 513342566.

It is not a de Polignac number, because 665243315 - 2⁶ = 665243251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4526 + ... + 36755.

It is an arithmetic number, because the mean of its divisors is an integer number (54616086).

Almost surely, 2^665243315 is an apocalyptic number.

665243315 is a deficient number, since it is larger than the sum of its proper divisors (208614061).

665243315 is a wasteful number, since it uses less digits than its factorization.

665243315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41590.

The product of its digits is 64800, while the sum is 35.

The square root of 665243315 is about 25792.3111604990. The cubic root of 665243315 is about 872.9583156523.

The spelling of 665243315 in words is "six hundred sixty-five million, two hundred forty-three thousand, three hundred fifteen".