76581081 has 6 divisors (see below), whose sum is σ = 110617130. Its totient is φ = 51054048.

The previous prime is 76581059. The next prime is 76581091. The reversal of 76581081 is 18018567.

76581081 is a `hidden beast` number, since 76 + 581 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56250000 + 20331081 = 7500^2 + 4509^2 .

It is not a de Polignac number, because 76581081 - 2²² = 72386777 is a prime.

It is a super-2 number, since 2×76581081² = 11729323934257122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76581041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4254496 + ... + 4254513.

Almost surely, 2^76581081 is an apocalyptic number.

It is an amenable number.

76581081 is a deficient number, since it is larger than the sum of its proper divisors (34036049).

76581081 is a wasteful number, since it uses less digits than its factorization.

76581081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509015 (or 8509012 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 76581081 is about 8751.0617070159. The cubic root of 76581081 is about 424.6591611006.

The spelling of 76581081 in words is "seventy-six million, five hundred eighty-one thousand, eighty-one".