66202313 has 4 divisors (see below), whose sum is σ = 67109268. Its totient is φ = 65295360.

The previous prime is 66202277. The next prime is 66202321. The reversal of 66202313 is 31320266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31956409 + 34245904 = 5653^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 66202313 - 2¹⁸ = 65940169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66202343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453368 + ... + 453513.

It is an arithmetic number, because the mean of its divisors is an integer number (16777317).

Almost surely, 2^66202313 is an apocalyptic number.

It is an amenable number.

66202313 is a deficient number, since it is larger than the sum of its proper divisors (906955).

66202313 is an equidigital number, since it uses as much as digits as its factorization.

66202313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906954.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66202313 is about 8136.4803815901. The cubic root of 66202313 is about 404.5365078234.

Adding to 66202313 its reverse (31320266), we get a palindrome (97522579).

The spelling of 66202313 in words is "sixty-six million, two hundred two thousand, three hundred thirteen".