55166689 has 8 divisors (see below), whose sum is σ = 56615328. Its totient is φ = 53723040.

The previous prime is 55166687. The next prime is 55166731. The reversal of 55166689 is 98666155.

55166689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55166689 - 2¹ = 55166687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55166687) 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, 33094 + ... + 34720.

It is an arithmetic number, because the mean of its divisors is an integer number (7076916).

Almost surely, 2^55166689 is an apocalyptic number.

It is an amenable number.

55166689 is a deficient number, since it is larger than the sum of its proper divisors (1448639).

55166689 is a wasteful number, since it uses less digits than its factorization.

55166689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its digits is 388800, while the sum is 46.

The square root of 55166689 is about 7427.4281551557. The cubic root of 55166689 is about 380.6790466940.

It can be divided in two parts, 55166 and 689, that added together give a palindrome (55855).

The spelling of 55166689 in words is "fifty-five million, one hundred sixty-six thousand, six hundred eighty-nine".