660771027 has 60 divisors (see below), whose sum is σ = 1154833680. Its totient is φ = 375417504.

The previous prime is 660770969. The next prime is 660771053. The reversal of 660771027 is 720177066.

It is a de Polignac number, because none of the positive numbers 2^k-660771027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660770982 and 660771000.

It is not an unprimeable number, because it can be changed into a prime (660771427) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 908538 + ... + 909264.

It is an arithmetic number, because the mean of its divisors is an integer number (19247228).

Almost surely, 2^660771027 is an apocalyptic number.

660771027 is a deficient number, since it is larger than the sum of its proper divisors (494062653).

660771027 is a wasteful number, since it uses less digits than its factorization.

660771027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 660771027 is about 25705.4668699092. The cubic root of 660771027 is about 870.9976782984.

The spelling of 660771027 in words is "six hundred sixty million, seven hundred seventy-one thousand, twenty-seven".