660963937 has 2 divisors, whose sum is σ = 660963938. Its totient is φ = 660963936.

The previous prime is 660963913. The next prime is 660963983. The reversal of 660963937 is 739369066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 526427136 + 134536801 = 22944^2 + 11599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660963937 is a prime.

It is not a weakly prime, because it can be changed into another prime (660963997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330481968 + 330481969.

It is an arithmetic number, because the mean of its divisors is an integer number (330481969).

Almost surely, 2^660963937 is an apocalyptic number.

It is an amenable number.

660963937 is a deficient number, since it is larger than the sum of its proper divisors (1).

660963937 is an equidigital number, since it uses as much as digits as its factorization.

660963937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The square root of 660963937 is about 25709.2189107332. The cubic root of 660963937 is about 871.0824317185.

The spelling of 660963937 in words is "six hundred sixty million, nine hundred sixty-three thousand, nine hundred thirty-seven".