1660011155 has 32 divisors (see below), whose sum is σ = 2304946368. Its totient is φ = 1134284800.

The previous prime is 1660011137. The next prime is 1660011181. The reversal of 1660011155 is 5511100661.

It is not a de Polignac number, because 1660011155 - 2⁶ = 1660011091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710369 + ... + 712701.

It is an arithmetic number, because the mean of its divisors is an integer number (72029574).

Almost surely, 2^1660011155 is an apocalyptic number.

1660011155 is a deficient number, since it is larger than the sum of its proper divisors (644935213).

1660011155 is a wasteful number, since it uses less digits than its factorization.

1660011155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1660011155 is about 40743.2344690502. The cubic root of 1660011155 is about 1184.0507997573.

The spelling of 1660011155 in words is "one billion, six hundred sixty million, eleven thousand, one hundred fifty-five".