55455566 has 16 divisors (see below), whose sum is σ = 88258560. Its totient is φ = 26059320.

The previous prime is 55455557. The next prime is 55455583. The reversal of 55455566 is 66555455.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920 + ... + 10571.

It is an arithmetic number, because the mean of its divisors is an integer number (5516160).

Almost surely, 2^55455566 is an apocalyptic number.

55455566 is a deficient number, since it is larger than the sum of its proper divisors (32802994).

55455566 is a wasteful number, since it uses less digits than its factorization.

55455566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11639.

The product of its digits is 450000, while the sum is 41.

The square root of 55455566 is about 7446.8494009212. The cubic root of 55455566 is about 381.3423577732.

It can be divided in two parts, 5545 and 5566, that added together give a palindrome (11111).

The spelling of 55455566 in words is "fifty-five million, four hundred fifty-five thousand, five hundred sixty-six".