130156661 has 4 divisors (see below), whose sum is σ = 130190892. Its totient is φ = 130122432.

The previous prime is 130156633. The next prime is 130156717. The reversal of 130156661 is 166651031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128482225 + 1674436 = 11335^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 130156661 - 2⁶ = 130156597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130156601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10580 + ... + 19293.

It is an arithmetic number, because the mean of its divisors is an integer number (32547723).

Almost surely, 2^130156661 is an apocalyptic number.

It is an amenable number.

130156661 is a deficient number, since it is larger than the sum of its proper divisors (34231).

130156661 is an equidigital number, since it uses as much as digits as its factorization.

130156661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34230.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 130156661 is about 11408.6222218110. The cubic root of 130156661 is about 506.7831106921.

The spelling of 130156661 in words is "one hundred thirty million, one hundred fifty-six thousand, six hundred sixty-one".