666613130 has 16 divisors (see below), whose sum is σ = 1211785704. Its totient is φ = 264004800.

The previous prime is 666613121. The next prime is 666613141. The reversal of 666613130 is 31316666.

It can be written as a sum of positive squares in 4 ways, for example, as 620059801 + 46553329 = 24901^2 + 6823^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328997 + ... + 331016.

Almost surely, 2^666613130 is an apocalyptic number.

666613130 is a deficient number, since it is larger than the sum of its proper divisors (545172574).

666613130 is a wasteful number, since it uses less digits than its factorization.

666613130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660121.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 666613130 is about 25818.8522208095. The cubic root of 666613130 is about 873.5570798172.

Adding to 666613130 its reverse (31316666), we get a palindrome (697929796).

The spelling of 666613130 in words is "six hundred sixty-six million, six hundred thirteen thousand, one hundred thirty".