55665442 has 32 divisors (see below), whose sum is σ = 99429120. Its totient is φ = 22868160.

The previous prime is 55665439. The next prime is 55665473. The reversal of 55665442 is 24456655.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67392 + ... + 68212.

It is an arithmetic number, because the mean of its divisors is an integer number (3107160).

Almost surely, 2^55665442 is an apocalyptic number.

55665442 is a deficient number, since it is larger than the sum of its proper divisors (43763678).

55665442 is a wasteful number, since it uses less digits than its factorization.

55665442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its digits is 144000, while the sum is 37.

The square root of 55665442 is about 7460.9276903077. The cubic root of 55665442 is about 381.8228256530.

The spelling of 55665442 in words is "fifty-five million, six hundred sixty-five thousand, four hundred forty-two".