55666553796 has 72 divisors (see below), whose sum is σ = 161086109184. Its totient is φ = 15877866240.

The previous prime is 55666553777. The next prime is 55666553807. The reversal of 55666553796 is 69735566655.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36820 + ... + 335691.

It is an arithmetic number, because the mean of its divisors is an integer number (2237307072).

Almost surely, 2^55666553796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55666553796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80543054592).

55666553796 is an abundant number, since it is smaller than the sum of its proper divisors (105419555388).

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

55666553796 is a wasteful number, since it uses less digits than its factorization.

55666553796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373121 (or 373116 counting only the distinct ones).

The product of its digits is 153090000, while the sum is 63.

The spelling of 55666553796 in words is "fifty-five billion, six hundred sixty-six million, five hundred fifty-three thousand, seven hundred ninety-six".