55566039 has 4 divisors (see below), whose sum is σ = 74088056. Its totient is φ = 37044024.

The previous prime is 55566031. The next prime is 55566053. The reversal of 55566039 is 93066555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55566039 - 2³ = 55566031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55565988 and 55566006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55566031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9261004 + ... + 9261009.

It is an arithmetic number, because the mean of its divisors is an integer number (18522014).

Almost surely, 2^55566039 is an apocalyptic number.

55566039 is a deficient number, since it is larger than the sum of its proper divisors (18522017).

55566039 is a wasteful number, since it uses less digits than its factorization.

55566039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18522016.

The product of its (nonzero) digits is 121500, while the sum is 39.

The square root of 55566039 is about 7454.2631426587. The cubic root of 55566039 is about 381.5954137713.

The spelling of 55566039 in words is "fifty-five million, five hundred sixty-six thousand, thirty-nine".