76666537 has 2 divisors, whose sum is σ = 76666538. Its totient is φ = 76666536.

The previous prime is 76666511. The next prime is 76666543. The reversal of 76666537 is 73566667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53056656 + 23609881 = 7284^2 + 4859^2 .

It is a cyclic number.

It is not a de Polignac number, because 76666537 - 2⁷ = 76666409 is a prime.

It is not a weakly prime, because it can be changed into another prime (76666637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38333268 + 38333269.

It is an arithmetic number, because the mean of its divisors is an integer number (38333269).

Almost surely, 2^76666537 is an apocalyptic number.

It is an amenable number.

76666537 is a deficient number, since it is larger than the sum of its proper divisors (1).

76666537 is an equidigital number, since it uses as much as digits as its factorization.

76666537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 46.

The square root of 76666537 is about 8755.9429532175. The cubic root of 76666537 is about 424.8170599042.

The spelling of 76666537 in words is "seventy-six million, six hundred sixty-six thousand, five hundred thirty-seven".