660377713 has 2 divisors, whose sum is σ = 660377714. Its totient is φ = 660377712.

The previous prime is 660377689. The next prime is 660377723. The reversal of 660377713 is 317773066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482768784 + 177608929 = 21972^2 + 13327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660377713 is a prime.

It is a super-2 number, since 2×660377713² = 872197447654220738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (660377723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330188856 + 330188857.

It is an arithmetic number, because the mean of its divisors is an integer number (330188857).

Almost surely, 2^660377713 is an apocalyptic number.

It is an amenable number.

660377713 is a deficient number, since it is larger than the sum of its proper divisors (1).

660377713 is an equidigital number, since it uses as much as digits as its factorization.

660377713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 660377713 is about 25697.8153351603. The cubic root of 660377713 is about 870.8248279159.

The spelling of 660377713 in words is "six hundred sixty million, three hundred seventy-seven thousand, seven hundred thirteen".