130666660 has 24 divisors (see below), whose sum is σ = 274692600. Its totient is φ = 52210944.

The previous prime is 130666621. The next prime is 130666661. The reversal of 130666660 is 66666031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 295936 + 130370724 = 544^2 + 11418^2 .

It is not an unprimeable number, because it can be changed into a prime (130666661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19416 + ... + 25264.

It is an arithmetic number, because the mean of its divisors is an integer number (11445525).

Almost surely, 2^130666660 is an apocalyptic number.

130666660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130666660 is an abundant number, since it is smaller than the sum of its proper divisors (144025940).

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

130666660 is a wasteful number, since it uses less digits than its factorization.

130666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975 (or 6973 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 130666660 is about 11430.9518413822. The cubic root of 130666660 is about 507.4441654380. Note that the first 3 decimals are identical.

The spelling of 130666660 in words is "one hundred thirty million, six hundred sixty-six thousand, six hundred sixty".