76646767 has 2 divisors, whose sum is σ = 76646768. Its totient is φ = 76646766.

The previous prime is 76646743. The next prime is 76646783. The reversal of 76646767 is 76764667.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76646767 is a prime.

It is a super-4 number, since 4×76646767⁴ (a number of 33 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76646767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76646737) 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, 38323383 + 38323384.

It is an arithmetic number, because the mean of its divisors is an integer number (38323384).

Almost surely, 2^76646767 is an apocalyptic number.

76646767 is a deficient number, since it is larger than the sum of its proper divisors (1).

76646767 is an equidigital number, since it uses as much as digits as its factorization.

76646767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 49.

The square root of 76646767 is about 8754.8139329171. The cubic root of 76646767 is about 424.7805409064.

The spelling of 76646767 in words is "seventy-six million, six hundred forty-six thousand, seven hundred sixty-seven".