1660765231 has 2 divisors, whose sum is σ = 1660765232. Its totient is φ = 1660765230.

The previous prime is 1660765153. The next prime is 1660765259. The reversal of 1660765231 is 1325670661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1660765231 - 2⁹ = 1660764719 is a prime.

It is a super-2 number, since 2×1660765231² = 5516282304996966722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660765031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830382615 + 830382616.

It is an arithmetic number, because the mean of its divisors is an integer number (830382616).

Almost surely, 2^1660765231 is an apocalyptic number.

1660765231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660765231 is an equidigital number, since it uses as much as digits as its factorization.

1660765231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1660765231 is about 40752.4874210152. The cubic root of 1660765231 is about 1184.2300614297.

The spelling of 1660765231 in words is "one billion, six hundred sixty million, seven hundred sixty-five thousand, two hundred thirty-one".