660071577 has 12 divisors (see below), whose sum is σ = 967378160. Its totient is φ = 400043160.

The previous prime is 660071557. The next prime is 660071579. The reversal of 660071577 is 775170066.

It is not a de Polignac number, because 660071577 - 2²⁸ = 391636121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660071579) by changing a digit.

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, 908827 + ... + 909552.

Almost surely, 2^660071577 is an apocalyptic number.

It is an amenable number.

660071577 is a deficient number, since it is larger than the sum of its proper divisors (307306583).

660071577 is a wasteful number, since it uses less digits than its factorization.

660071577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818404 (or 1818393 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 660071577 is about 25691.8581850360. The cubic root of 660071577 is about 870.6902422941.

The spelling of 660071577 in words is "six hundred sixty million, seventy-one thousand, five hundred seventy-seven".