660520315 has 32 divisors (see below), whose sum is σ = 980622720. Its totient is φ = 415908864.

The previous prime is 660520297. The next prime is 660520349. The reversal of 660520315 is 513025066.

It is not a de Polignac number, because 660520315 - 2¹⁵ = 660487547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85951 + ... + 93319.

It is an arithmetic number, because the mean of its divisors is an integer number (30644460).

Almost surely, 2^660520315 is an apocalyptic number.

660520315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

660520315 is a deficient number, since it is larger than the sum of its proper divisors (320102405).

660520315 is a wasteful number, since it uses less digits than its factorization.

660520315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 660520315 is about 25700.5897792249. The cubic root of 660520315 is about 870.8875053918.

The spelling of 660520315 in words is "six hundred sixty million, five hundred twenty thousand, three hundred fifteen".