55686699 has 12 divisors (see below), whose sum is σ = 83210400. Its totient is φ = 35844144.

The previous prime is 55686691. The next prime is 55686707. The reversal of 55686699 is 99668655.

55686699 is a `hidden beast` number, since 556 + 86 + 6 + 9 + 9 = 666.

55686699 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (55686691) and next prime (55686707).

It is not a de Polignac number, because 55686699 - 2³ = 55686691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55686691) 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, 106419 + ... + 106940.

It is an arithmetic number, because the mean of its divisors is an integer number (6934200).

Almost surely, 2^55686699 is an apocalyptic number.

55686699 is a deficient number, since it is larger than the sum of its proper divisors (27523701).

55686699 is a wasteful number, since it uses less digits than its factorization.

55686699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213394 (or 213391 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 55686699 is about 7462.3521090873. The cubic root of 55686699 is about 381.8714217813.

The spelling of 55686699 in words is "fifty-five million, six hundred eighty-six thousand, six hundred ninety-nine".