55166500566 has 12 divisors (see below), whose sum is σ = 119527417932. Its totient is φ = 18388833516.

The previous prime is 55166500559. The next prime is 55166500583. The reversal of 55166500566 is 66500566155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1532402776 + ... + 1532402811.

It is an arithmetic number, because the mean of its divisors is an integer number (9960618161).

Almost surely, 2^55166500566 is an apocalyptic number.

55166500566 is an abundant number, since it is smaller than the sum of its proper divisors (64360917366).

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

55166500566 is a wasteful number, since it uses less digits than its factorization.

55166500566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064805595 (or 3064805592 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 55166500566 in words is "fifty-five billion, one hundred sixty-six million, five hundred thousand, five hundred sixty-six".