76566013 has 2 divisors, whose sum is σ = 76566014. Its totient is φ = 76566012.

The previous prime is 76565999. The next prime is 76566019. The reversal of 76566013 is 31066567.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48972004 + 27594009 = 6998^2 + 5253^2 .

It is a cyclic number.

It is not a de Polignac number, because 76566013 - 2⁵ = 76565981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76566013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76566019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38283006 + 38283007.

It is an arithmetic number, because the mean of its divisors is an integer number (38283007).

Almost surely, 2^76566013 is an apocalyptic number.

It is an amenable number.

76566013 is a deficient number, since it is larger than the sum of its proper divisors (1).

76566013 is an equidigital number, since it uses as much as digits as its factorization.

76566013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 76566013 is about 8750.2007405545. The cubic root of 76566013 is about 424.6313074677.

The spelling of 76566013 in words is "seventy-six million, five hundred sixty-six thousand, thirteen".