55666600055 has 16 divisors (see below), whose sum is σ = 73017552384. Its totient is φ = 40404293280.

The previous prime is 55666600021. The next prime is 55666600069. The reversal of 55666600055 is 55000666655.

It is not a de Polignac number, because 55666600055 - 2⁸ = 55666599799 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55666599979 and 55666600015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 978419 + ... + 1033748.

It is an arithmetic number, because the mean of its divisors is an integer number (4563597024).

Almost surely, 2^55666600055 is an apocalyptic number.

55666600055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55666600055 is a deficient number, since it is larger than the sum of its proper divisors (17350952329).

55666600055 is a wasteful number, since it uses less digits than its factorization.

55666600055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012686.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 55666600055 in words is "fifty-five billion, six hundred sixty-six million, six hundred thousand, fifty-five".