130166781 has 8 divisors (see below), whose sum is σ = 176830560. Its totient is φ = 85140432.

The previous prime is 130166753. The next prime is 130166783. The reversal of 130166781 is 187661031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130166781 - 2⁵ = 130166749 is a prime.

It is a super-2 number, since 2×130166781² = 33886781751803922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130166783) 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, 409171 + ... + 409488.

It is an arithmetic number, because the mean of its divisors is an integer number (22103820).

Almost surely, 2^130166781 is an apocalyptic number.

It is an amenable number.

130166781 is a deficient number, since it is larger than the sum of its proper divisors (46663779).

130166781 is an equidigital number, since it uses as much as digits as its factorization.

130166781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818715.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 130166781 is about 11409.0657373862. The cubic root of 130166781 is about 506.7962448955.

The spelling of 130166781 in words is "one hundred thirty million, one hundred sixty-six thousand, seven hundred eighty-one".