667085715 has 12 divisors (see below), whose sum is σ = 1156281984. Its totient is φ = 355779024.

The previous prime is 667085707. The next prime is 667085747. The reversal of 667085715 is 517580766.

667085715 is a `hidden beast` number, since 6 + 6 + 70 + 8 + 571 + 5 = 666.

It is not a de Polignac number, because 667085715 - 2³ = 667085707 is a prime.

It is a super-2 number, since 2×667085715² = 890006702314122450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14824127 = 667085715 / (6 + 6 + 7 + 0 + 8 + 5 + 7 + 1 + 5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7412019 + ... + 7412108.

It is an arithmetic number, because the mean of its divisors is an integer number (96356832).

Almost surely, 2^667085715 is an apocalyptic number.

667085715 is a deficient number, since it is larger than the sum of its proper divisors (489196269).

667085715 is a wasteful number, since it uses less digits than its factorization.

667085715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14824138 (or 14824135 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 667085715 is about 25828.0025360073. The cubic root of 667085715 is about 873.7634626181.

The spelling of 667085715 in words is "six hundred sixty-seven million, eighty-five thousand, seven hundred fifteen".