76660249 has 2 divisors, whose sum is σ = 76660250. Its totient is φ = 76660248.

The previous prime is 76660187. The next prime is 76660277. The reversal of 76660249 is 94206667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59907600 + 16752649 = 7740^2 + 4093^2 .

It is an emirp because it is prime and its reverse (94206667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76660249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76660289) 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, 38330124 + 38330125.

It is an arithmetic number, because the mean of its divisors is an integer number (38330125).

Almost surely, 2^76660249 is an apocalyptic number.

It is an amenable number.

76660249 is a deficient number, since it is larger than the sum of its proper divisors (1).

76660249 is an equidigital number, since it uses as much as digits as its factorization.

76660249 is an odious number, because the sum of its binary digits is odd.

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

The square root of 76660249 is about 8755.5838754477. The cubic root of 76660249 is about 424.8054454380.

The spelling of 76660249 in words is "seventy-six million, six hundred sixty thousand, two hundred forty-nine".