76747761 has 6 divisors (see below), whose sum is σ = 110857890. Its totient is φ = 51165168.

The previous prime is 76747753. The next prime is 76747793. The reversal of 76747761 is 16774767.

It can be written as a sum of positive squares in only one way, i.e., 74909025 + 1838736 = 8655^2 + 1356^2 .

It is not a de Polignac number, because 76747761 - 2³ = 76747753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76747261) 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 in 5 ways as a sum of consecutive naturals, for example, 4263756 + ... + 4263773.

It is an arithmetic number, because the mean of its divisors is an integer number (18476315).

Almost surely, 2^76747761 is an apocalyptic number.

It is an amenable number.

76747761 is a deficient number, since it is larger than the sum of its proper divisors (34110129).

76747761 is a wasteful number, since it uses less digits than its factorization.

76747761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527535 (or 8527532 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 76747761 is about 8760.5799465560. The cubic root of 76747761 is about 424.9670304297.

The spelling of 76747761 in words is "seventy-six million, seven hundred forty-seven thousand, seven hundred sixty-one".