76681857 has 16 divisors (see below), whose sum is σ = 119567360. Its totient is φ = 42798672.

The previous prime is 76681841. The next prime is 76681859. The reversal of 76681857 is 75818667.

It is not a de Polignac number, because 76681857 - 2⁴ = 76681841 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76681859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41557 + ... + 43362.

It is an arithmetic number, because the mean of its divisors is an integer number (7472960).

Almost surely, 2^76681857 is an apocalyptic number.

It is an amenable number.

76681857 is a deficient number, since it is larger than the sum of its proper divisors (42885503).

76681857 is a wasteful number, since it uses less digits than its factorization.

76681857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84972.

The product of its digits is 564480, while the sum is 48.

The square root of 76681857 is about 8756.8177439067. The cubic root of 76681857 is about 424.8453545777.

The spelling of 76681857 in words is "seventy-six million, six hundred eighty-one thousand, eight hundred fifty-seven".