55666672836 has 12 divisors (see below), whose sum is σ = 129888903312. Its totient is φ = 18555557608.

The previous prime is 55666672801. The next prime is 55666672861. The reversal of 55666672836 is 63827666655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55666672836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319444690 + ... + 2319444713.

It is an arithmetic number, because the mean of its divisors is an integer number (10824075276).

Almost surely, 2^55666672836 is an apocalyptic number.

It is an amenable number.

55666672836 is an abundant number, since it is smaller than the sum of its proper divisors (74222230476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55666672836 is a wasteful number, since it uses less digits than its factorization.

55666672836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638889410 (or 4638889408 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 60.

The spelling of 55666672836 in words is "fifty-five billion, six hundred sixty-six million, six hundred seventy-two thousand, eight hundred thirty-six".