66313901 has 2 divisors, whose sum is σ = 66313902. Its totient is φ = 66313900.

The previous prime is 66313883. The next prime is 66313909. The reversal of 66313901 is 10931366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56265001 + 10048900 = 7501^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 66313901 - 2⁶ = 66313837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66313909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33156950 + 33156951.

It is an arithmetic number, because the mean of its divisors is an integer number (33156951).

Almost surely, 2^66313901 is an apocalyptic number.

It is an amenable number.

66313901 is a deficient number, since it is larger than the sum of its proper divisors (1).

66313901 is an equidigital number, since it uses as much as digits as its factorization.

66313901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 66313901 is about 8143.3347591758. The cubic root of 66313901 is about 404.7636704841.

The spelling of 66313901 in words is "sixty-six million, three hundred thirteen thousand, nine hundred one".