76668313 has 2 divisors, whose sum is σ = 76668314. Its totient is φ = 76668312.

The previous prime is 76668307. The next prime is 76668341. The reversal of 76668313 is 31386667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72539289 + 4129024 = 8517^2 + 2032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76668313 is a prime.

It is not a weakly prime, because it can be changed into another prime (76668413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38334156 + 38334157.

It is an arithmetic number, because the mean of its divisors is an integer number (38334157).

Almost surely, 2^76668313 is an apocalyptic number.

It is an amenable number.

76668313 is a deficient number, since it is larger than the sum of its proper divisors (1).

76668313 is an equidigital number, since it uses as much as digits as its factorization.

76668313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 76668313 is about 8756.0443694627. The cubic root of 76668313 is about 424.8203402109.

The spelling of 76668313 in words is "seventy-six million, six hundred sixty-eight thousand, three hundred thirteen".