686251077 has 8 divisors (see below), whose sum is σ = 915467616. Its totient is φ = 457267632.

The previous prime is 686251073. The next prime is 686251103. The reversal of 686251077 is 770152686.

686251077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 686251077 - 2² = 686251073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686251073) 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, 51283 + ... + 63264.

It is an arithmetic number, because the mean of its divisors is an integer number (114433452).

Almost surely, 2^686251077 is an apocalyptic number.

It is an amenable number.

686251077 is a deficient number, since it is larger than the sum of its proper divisors (229216539).

686251077 is a wasteful number, since it uses less digits than its factorization.

686251077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116547.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 686251077 is about 26196.3943511316. The cubic root of 686251077 is about 882.0523194883.

The spelling of 686251077 in words is "six hundred eighty-six million, two hundred fifty-one thousand, seventy-seven".