686533477077 has 96 divisors (see below), whose sum is σ = 1218858451200. Its totient is φ = 363459723264.

The previous prime is 686533477061. The next prime is 686533477127. The reversal of 686533477077 is 770774335686.

It is a happy number.

686533477077 is a `hidden beast` number, since 6 + 8 + 65 + 33 + 477 + 0 + 77 = 666.

It is not a de Polignac number, because 686533477077 - 2⁴ = 686533477061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686533477037) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21621549 + ... + 21653277.

It is an arithmetic number, because the mean of its divisors is an integer number (12696442200).

Almost surely, 2^686533477077 is an apocalyptic number.

It is an amenable number.

686533477077 is a deficient number, since it is larger than the sum of its proper divisors (532324974123).

686533477077 is a wasteful number, since it uses less digits than its factorization.

686533477077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32075 (or 32072 counting only the distinct ones).

The product of its (nonzero) digits is 124467840, while the sum is 63.

The spelling of 686533477077 in words is "six hundred eighty-six billion, five hundred thirty-three million, four hundred seventy-seven thousand, seventy-seven".