660886313 has 2 divisors, whose sum is σ = 660886314. Its totient is φ = 660886312.

The previous prime is 660886279. The next prime is 660886327. The reversal of 660886313 is 313688066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388405264 + 272481049 = 19708^2 + 16507^2 .

It is a cyclic number.

It is not a de Polignac number, because 660886313 - 2¹⁸ = 660624169 is a prime.

It is equal to p_34329875 and since 660886313 and 34329875 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (660886013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330443156 + 330443157.

It is an arithmetic number, because the mean of its divisors is an integer number (330443157).

Almost surely, 2^660886313 is an apocalyptic number.

It is an amenable number.

660886313 is a deficient number, since it is larger than the sum of its proper divisors (1).

660886313 is an equidigital number, since it uses as much as digits as its factorization.

660886313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 660886313 is about 25707.7092133858. The cubic root of 660886313 is about 871.0483302363.

The spelling of 660886313 in words is "six hundred sixty million, eight hundred eighty-six thousand, three hundred thirteen".