55105666 has 16 divisors (see below), whose sum is σ = 103055040. Its totient is φ = 21469680.

The previous prime is 55105663. The next prime is 55105679. The reversal of 55105666 is 66650155.

It is not an unprimeable number, because it can be changed into a prime (55105663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178761 + ... + 179068.

It is an arithmetic number, because the mean of its divisors is an integer number (6440940).

Almost surely, 2^55105666 is an apocalyptic number.

55105666 is a deficient number, since it is larger than the sum of its proper divisors (47949374).

55105666 is a wasteful number, since it uses less digits than its factorization.

55105666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357849.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 55105666 is about 7423.3190689879. The cubic root of 55105666 is about 380.5386313543.

The spelling of 55105666 in words is "fifty-five million, one hundred five thousand, six hundred sixty-six".