77336881 has 8 divisors (see below), whose sum is σ = 80415720. Its totient is φ = 74285568.

The previous prime is 77336873. The next prime is 77336887. The reversal of 77336881 is 18863377.

It can be written as a sum of positive squares in 4 ways, for example, as 57623281 + 19713600 = 7591^2 + 4440^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77336881 - 2³ = 77336873 is a prime.

It is a super-2 number, since 2×77336881² = 11961986325616322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77336887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056 + ... + 12481.

It is an arithmetic number, because the mean of its divisors is an integer number (10051965).

Almost surely, 2^77336881 is an apocalyptic number.

It is an amenable number.

77336881 is a deficient number, since it is larger than the sum of its proper divisors (3078839).

77336881 is a wasteful number, since it uses less digits than its factorization.

77336881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13763.

The product of its digits is 169344, while the sum is 43.

The square root of 77336881 is about 8794.1390141389. The cubic root of 77336881 is about 426.0516167333.

The spelling of 77336881 in words is "seventy-seven million, three hundred thirty-six thousand, eight hundred eighty-one".