76774681 has 2 divisors, whose sum is σ = 76774682. Its totient is φ = 76774680.

The previous prime is 76774679. The next prime is 76774699. The reversal of 76774681 is 18647767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67502656 + 9272025 = 8216^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 76774681 - 2¹ = 76774679 is a prime.

It is a super-2 number, since 2×76774681² = 11788703285303522, which contains 22 as substring.

Together with 76774679, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76774081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38387340 + 38387341.

It is an arithmetic number, because the mean of its divisors is an integer number (38387341).

Almost surely, 2^76774681 is an apocalyptic number.

It is an amenable number.

76774681 is a deficient number, since it is larger than the sum of its proper divisors (1).

76774681 is an equidigital number, since it uses as much as digits as its factorization.

76774681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 76774681 is about 8762.1162398133. The cubic root of 76774681 is about 425.0167116843.

The spelling of 76774681 in words is "seventy-six million, seven hundred seventy-four thousand, six hundred eighty-one".