660808071 has 96 divisors (see below), whose sum is σ = 1315906560. Its totient is φ = 322963200.

The previous prime is 660808063. The next prime is 660808073. The reversal of 660808071 is 170808066.

It is not a de Polignac number, because 660808071 - 2³ = 660808063 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660808073) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246066 + ... + 248736.

It is an arithmetic number, because the mean of its divisors is an integer number (13707360).

Almost surely, 2^660808071 is an apocalyptic number.

660808071 is a deficient number, since it is larger than the sum of its proper divisors (655098489).

660808071 is a wasteful number, since it uses less digits than its factorization.

660808071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722 (or 2709 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 660808071 is about 25706.1874069260. The cubic root of 660808071 is about 871.0139545543.

The spelling of 660808071 in words is "six hundred sixty million, eight hundred eight thousand, seventy-one".