18116777 has 8 divisors (see below), whose sum is σ = 20746176. Its totient is φ = 15497712.

The previous prime is 18116767. The next prime is 18116789. The reversal of 18116777 is 77761181.

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 18116777 - 2⁸ = 18116521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18116777.

It is not an unprimeable number, because it can be changed into a prime (18116767) 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, 1643 + ... + 6239.

It is an arithmetic number, because the mean of its divisors is an integer number (2593272).

Almost surely, 2^18116777 is an apocalyptic number.

It is an amenable number.

18116777 is a deficient number, since it is larger than the sum of its proper divisors (2629399).

18116777 is an equidigital number, since it uses as much as digits as its factorization.

18116777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5167.

The product of its digits is 16464, while the sum is 38.

The square root of 18116777 is about 4256.3807395486. The cubic root of 18116777 is about 262.6396632451.

The spelling of 18116777 in words is "eighteen million, one hundred sixteen thousand, seven hundred seventy-seven".