291160660 has 24 divisors (see below), whose sum is σ = 698785920. Its totient is φ = 99826464.

The previous prime is 291160651. The next prime is 291160669. The reversal of 291160660 is 66061192.

It is an interprime number because it is at equal distance from previous prime (291160651) and next prime (291160669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291160669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039720 + ... + 1039999.

It is an arithmetic number, because the mean of its divisors is an integer number (29116080).

Almost surely, 2^291160660 is an apocalyptic number.

291160660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291160660 is an abundant number, since it is smaller than the sum of its proper divisors (407625260).

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

291160660 is a wasteful number, since it uses less digits than its factorization.

291160660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079735 (or 2079733 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 291160660 is about 17063.4304874489. The cubic root of 291160660 is about 662.7924689445.

The spelling of 291160660 in words is "two hundred ninety-one million, one hundred sixty thousand, six hundred sixty".