66313349 has 2 divisors, whose sum is σ = 66313350. Its totient is φ = 66313348.

The previous prime is 66313339. The next prime is 66313369. The reversal of 66313349 is 94331366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 4900 = 8143^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 66313349 - 2²⁴ = 49536133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66313339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33156674 + 33156675.

It is an arithmetic number, because the mean of its divisors is an integer number (33156675).

Almost surely, 2^66313349 is an apocalyptic number.

It is an amenable number.

66313349 is a deficient number, since it is larger than the sum of its proper divisors (1).

66313349 is an equidigital number, since it uses as much as digits as its factorization.

66313349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 66313349 is about 8143.3008663563. The cubic root of 66313349 is about 404.7625473904.

The spelling of 66313349 in words is "sixty-six million, three hundred thirteen thousand, three hundred forty-nine".