55686807 has 12 divisors (see below), whose sum is σ = 87749064. Its totient is φ = 33749520.

The previous prime is 55686779. The next prime is 55686811. The reversal of 55686807 is 70868655.

55686807 is a `hidden beast` number, since 5 + 568 + 6 + 80 + 7 = 666.

It is not a de Polignac number, because 55686807 - 2⁸ = 55686551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55686877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281148 + ... + 281345.

It is an arithmetic number, because the mean of its divisors is an integer number (7312422).

Almost surely, 2^55686807 is an apocalyptic number.

55686807 is a deficient number, since it is larger than the sum of its proper divisors (32062257).

55686807 is a wasteful number, since it uses less digits than its factorization.

55686807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562510 (or 562507 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 55686807 is about 7462.3593454081. The cubic root of 55686807 is about 381.8716686511.

The spelling of 55686807 in words is "fifty-five million, six hundred eighty-six thousand, eight hundred seven".