660076815 has 16 divisors (see below), whose sum is σ = 1111708800. Its totient is φ = 333512352.

The previous prime is 660076783. The next prime is 660076817. The reversal of 660076815 is 518670066.

It is not a de Polignac number, because 660076815 - 2⁵ = 660076783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660076817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1157745 + ... + 1158314.

It is an arithmetic number, because the mean of its divisors is an integer number (69481800).

Almost surely, 2^660076815 is an apocalyptic number.

660076815 is a deficient number, since it is larger than the sum of its proper divisors (451631985).

660076815 is a wasteful number, since it uses less digits than its factorization.

660076815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316086.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 660076815 is about 25691.9601237430. The cubic root of 660076815 is about 870.6925454097.

The spelling of 660076815 in words is "six hundred sixty million, seventy-six thousand, eight hundred fifteen".