1660011156 has 36 divisors (see below), whose sum is σ = 4340836500. Its totient is φ = 534256128.

The previous prime is 1660011137. The next prime is 1660011181. The reversal of 1660011156 is 6511100661.

1660011156 is a `hidden beast` number, since 1 + 6 + 600 + 1 + 1 + 1 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1332980100 + 327031056 = 36510^2 + 18084^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 793981 + ... + 796068.

Almost surely, 2^1660011156 is an apocalyptic number.

It is an amenable number.

1660011156 is an abundant number, since it is smaller than the sum of its proper divisors (2680825344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660011156 is a wasteful number, since it uses less digits than its factorization.

1660011156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590088 (or 1590083 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1660011156 is about 40743.2344813222. The cubic root of 1660011156 is about 1184.0507999950.

The spelling of 1660011156 in words is "one billion, six hundred sixty million, eleven thousand, one hundred fifty-six".