660246481 has 2 divisors, whose sum is σ = 660246482. Its totient is φ = 660246480.

The previous prime is 660246449. The next prime is 660246497. The reversal of 660246481 is 184642066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660233025 + 13456 = 25695^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 660246481 - 2⁵ = 660246449 is a prime.

It is a super-2 number, since 2×660246481² = 871850831345766722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660246481.

It is not a weakly prime, because it can be changed into another prime (660246421) 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, 330123240 + 330123241.

It is an arithmetic number, because the mean of its divisors is an integer number (330123241).

Almost surely, 2^660246481 is an apocalyptic number.

It is an amenable number.

660246481 is a deficient number, since it is larger than the sum of its proper divisors (1).

660246481 is an equidigital number, since it uses as much as digits as its factorization.

660246481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 660246481 is about 25695.2618394910. The cubic root of 660246481 is about 870.7671398926.

The spelling of 660246481 in words is "six hundred sixty million, two hundred forty-six thousand, four hundred eighty-one".