55456566 has 32 divisors (see below), whose sum is σ = 121264128. Its totient is φ = 16767840.

The previous prime is 55456547. The next prime is 55456571. The reversal of 55456566 is 66565455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50475 + ... + 51561.

It is an arithmetic number, because the mean of its divisors is an integer number (3789504).

Almost surely, 2^55456566 is an apocalyptic number.

55456566 is an abundant number, since it is smaller than the sum of its proper divisors (65807562).

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

55456566 is a wasteful number, since it uses less digits than its factorization.

55456566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876.

The product of its digits is 540000, while the sum is 42.

The square root of 55456566 is about 7446.9165431070. The cubic root of 55456566 is about 381.3446499391.

Subtracting 55456566 from its reverse (66565455), we obtain a square (11108889 = 3333²).

The spelling of 55456566 in words is "fifty-five million, four hundred fifty-six thousand, five hundred sixty-six".