1660506131 has 2 divisors, whose sum is σ = 1660506132. Its totient is φ = 1660506130.

The previous prime is 1660506061. The next prime is 1660506149. The reversal of 1660506131 is 1316050661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660506131 is a prime.

It is a super-2 number, since 2×1660506131² = 5514561222177178322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660506094 and 1660506103.

It is not a weakly prime, because it can be changed into another prime (1660506151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830253065 + 830253066.

It is an arithmetic number, because the mean of its divisors is an integer number (830253066).

Almost surely, 2^1660506131 is an apocalyptic number.

1660506131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660506131 is an equidigital number, since it uses as much as digits as its factorization.

1660506131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1660506131 is about 40749.3083499585. The cubic root of 1660506131 is about 1184.1684733615.

Adding to 1660506131 its reverse (1316050661), we get a palindrome (2976556792).

The spelling of 1660506131 in words is "one billion, six hundred sixty million, five hundred six thousand, one hundred thirty-one".