55415566 has 16 divisors (see below), whose sum is σ = 86651856. Its totient is φ = 26554176.

The previous prime is 55415557. The next prime is 55415567. The reversal of 55415566 is 66551455.

55415566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55415567) 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, 631 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (5415741).

Almost surely, 2^55415566 is an apocalyptic number.

55415566 is a deficient number, since it is larger than the sum of its proper divisors (31236290).

55415566 is a wasteful number, since it uses less digits than its factorization.

55415566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11283.

The product of its digits is 90000, while the sum is 37.

The square root of 55415566 is about 7444.1632169103. The cubic root of 55415566 is about 381.2506485342.

The spelling of 55415566 in words is "fifty-five million, four hundred fifteen thousand, five hundred sixty-six".