76312661 has 2 divisors, whose sum is σ = 76312662. Its totient is φ = 76312660.

The previous prime is 76312637. The next prime is 76312673. The reversal of 76312661 is 16621367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 27102436 = 7015^2 + 5206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76312661 is a prime.

It is a super-3 number, since 3×76312661³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76312681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38156330 + 38156331.

It is an arithmetic number, because the mean of its divisors is an integer number (38156331).

Almost surely, 2^76312661 is an apocalyptic number.

It is an amenable number.

76312661 is a deficient number, since it is larger than the sum of its proper divisors (1).

76312661 is an equidigital number, since it uses as much as digits as its factorization.

76312661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 76312661 is about 8735.7118198805. The cubic root of 76312661 is about 424.1624307204.

The spelling of 76312661 in words is "seventy-six million, three hundred twelve thousand, six hundred sixty-one".