55666743 has 8 divisors (see below), whose sum is σ = 80969856. Its totient is φ = 33737400.

The previous prime is 55666727. The next prime is 55666757. The reversal of 55666743 is 34766655.

55666743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55666743 - 2⁴ = 55666727 is a prime.

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 = 55666695 and 55666704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666763) 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, 843403 + ... + 843468.

It is an arithmetic number, because the mean of its divisors is an integer number (10121232).

Almost surely, 2^55666743 is an apocalyptic number.

55666743 is a deficient number, since it is larger than the sum of its proper divisors (25303113).

55666743 is a wasteful number, since it uses less digits than its factorization.

55666743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686885.

The product of its digits is 453600, while the sum is 42.

The square root of 55666743 is about 7461.0148773475. The cubic root of 55666743 is about 381.8258002551.

The spelling of 55666743 in words is "fifty-five million, six hundred sixty-six thousand, seven hundred forty-three".