81116077 has 8 divisors (see below), whose sum is σ = 92762496. Its totient is φ = 69484272.

The previous prime is 81116069. The next prime is 81116089. The reversal of 81116077 is 77061118.

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 81116077 - 2³ = 81116069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81111077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13848 + ... + 18814.

It is an arithmetic number, because the mean of its divisors is an integer number (11595312).

Almost surely, 2^81116077 is an apocalyptic number.

It is an amenable number.

81116077 is a deficient number, since it is larger than the sum of its proper divisors (11646419).

81116077 is a wasteful number, since it uses less digits than its factorization.

81116077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 81116077 is about 9006.4464135418. The cubic root of 81116077 is about 432.8814539281.

The spelling of 81116077 in words is "eighty-one million, one hundred sixteen thousand, seventy-seven".