55665942 has 16 divisors (see below), whose sum is σ = 112674240. Its totient is φ = 18331592.

The previous prime is 55665937. The next prime is 55665949. The reversal of 55665942 is 24956655.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 55665894 and 55665903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55665949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55392 + ... + 56387.

It is an arithmetic number, because the mean of its divisors is an integer number (7042140).

Almost surely, 2^55665942 is an apocalyptic number.

55665942 is an abundant number, since it is smaller than the sum of its proper divisors (57008298).

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

55665942 is a wasteful number, since it uses less digits than its factorization.

55665942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111867.

The product of its digits is 324000, while the sum is 42.

The square root of 55665942 is about 7460.9611981299. The cubic root of 55665942 is about 381.8239688568.

The spelling of 55665942 in words is "fifty-five million, six hundred sixty-five thousand, nine hundred forty-two".