55666266 has 16 divisors (see below), whose sum is σ = 114924288. Its totient is φ = 17956800.

The previous prime is 55666249. The next prime is 55666267. The reversal of 55666266 is 66266655.

55666266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55666267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149455 + ... + 149826.

It is an arithmetic number, because the mean of its divisors is an integer number (7182768).

Almost surely, 2^55666266 is an apocalyptic number.

55666266 is an abundant number, since it is smaller than the sum of its proper divisors (59258022).

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

55666266 is a wasteful number, since it uses less digits than its factorization.

55666266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299317.

The product of its digits is 388800, while the sum is 42.

The square root of 55666266 is about 7460.9829111183. The cubic root of 55666266 is about 381.8247096493.

The spelling of 55666266 in words is "fifty-five million, six hundred sixty-six thousand, two hundred sixty-six".