686116827 has 18 divisors (see below), whose sum is σ = 1089346076. Its totient is φ = 415827720.

The previous prime is 686116819. The next prime is 686116843. The reversal of 686116827 is 728611686.

It is a happy number.

686116827 is a `hidden beast` number, since 6 + 8 + 611 + 6 + 8 + 27 = 666.

It is not a de Polignac number, because 686116827 - 2³ = 686116819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686116897) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 313933 + ... + 316110.

Almost surely, 2^686116827 is an apocalyptic number.

686116827 is a deficient number, since it is larger than the sum of its proper divisors (403229249).

686116827 is a wasteful number, since it uses less digits than its factorization.

686116827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630071 (or 630057 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 686116827 is about 26193.8318502658. The cubic root of 686116827 is about 881.9947976616.

The spelling of 686116827 in words is "six hundred eighty-six million, one hundred sixteen thousand, eight hundred twenty-seven".