76696661 has 2 divisors, whose sum is σ = 76696662. Its totient is φ = 76696660.

The previous prime is 76696579. The next prime is 76696723. The reversal of 76696661 is 16669667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74822500 + 1874161 = 8650^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 76696661 - 2¹⁴ = 76680277 is a prime.

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 (76636661) 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, 38348330 + 38348331.

It is an arithmetic number, because the mean of its divisors is an integer number (38348331).

Almost surely, 2^76696661 is an apocalyptic number.

It is an amenable number.

76696661 is a deficient number, since it is larger than the sum of its proper divisors (1).

76696661 is an equidigital number, since it uses as much as digits as its factorization.

76696661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 76696661 is about 8757.6629873500. The cubic root of 76696661 is about 424.8726926652.

It can be divided in two parts, 7669666 and 1, that added together give a palindrome (7669667).

The spelling of 76696661 in words is "seventy-six million, six hundred ninety-six thousand, six hundred sixty-one".