55966199 has 4 divisors (see below), whose sum is σ = 58399536. Its totient is φ = 53532864.

The previous prime is 55966171. The next prime is 55966217. The reversal of 55966199 is 99166955.

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

It is a cyclic number.

It is not a de Polignac number, because 55966199 - 2¹² = 55962103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55966139) 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, 1216634 + ... + 1216679.

It is an arithmetic number, because the mean of its divisors is an integer number (14599884).

Almost surely, 2^55966199 is an apocalyptic number.

55966199 is a deficient number, since it is larger than the sum of its proper divisors (2433337).

55966199 is a wasteful number, since it uses less digits than its factorization.

55966199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433336.

The product of its digits is 656100, while the sum is 50.

The square root of 55966199 is about 7481.0560083453. The cubic root of 55966199 is about 382.5092460778.

It can be divided in two parts, 55966 and 199, that added together give a palindrome (56165).

The spelling of 55966199 in words is "fifty-five million, nine hundred sixty-six thousand, one hundred ninety-nine".