1660125517 has 2 divisors, whose sum is σ = 1660125518. Its totient is φ = 1660125516.

The previous prime is 1660125451. The next prime is 1660125527. The reversal of 1660125517 is 7155210661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1659258756 + 866761 = 40734^2 + 931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660125517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660125527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830062758 + 830062759.

It is an arithmetic number, because the mean of its divisors is an integer number (830062759).

Almost surely, 2^1660125517 is an apocalyptic number.

It is an amenable number.

1660125517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660125517 is an equidigital number, since it uses as much as digits as its factorization.

1660125517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1660125517 is about 40744.6378926111. The cubic root of 1660125517 is about 1184.0779897971.

The spelling of 1660125517 in words is "one billion, six hundred sixty million, one hundred twenty-five thousand, five hundred seventeen".