76668413 has 2 divisors, whose sum is σ = 76668414. Its totient is φ = 76668412.

The previous prime is 76668367. The next prime is 76668433. The reversal of 76668413 is 31486667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 158404 = 8747^2 + 398^2 .

It is a cyclic number.

It is not a de Polignac number, because 76668413 - 2¹² = 76664317 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 (76668433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38334206 + 38334207.

It is an arithmetic number, because the mean of its divisors is an integer number (38334207).

Almost surely, 2^76668413 is an apocalyptic number.

It is an amenable number.

76668413 is a deficient number, since it is larger than the sum of its proper divisors (1).

76668413 is an equidigital number, since it uses as much as digits as its factorization.

76668413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 76668413 is about 8756.0500798020. The cubic root of 76668413 is about 424.8205249114.

The spelling of 76668413 in words is "seventy-six million, six hundred sixty-eight thousand, four hundred thirteen".