55666199 has 2 divisors, whose sum is σ = 55666200. Its totient is φ = 55666198.

The previous prime is 55666183. The next prime is 55666217. The reversal of 55666199 is 99166655.

55666199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55666199 - 2⁴ = 55666183 is a prime.

It is a super-2 number, since 2×55666199² = 6197451422215202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666129) 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 as a sum of consecutive naturals, namely, 27833099 + 27833100.

It is an arithmetic number, because the mean of its divisors is an integer number (27833100).

Almost surely, 2^55666199 is an apocalyptic number.

55666199 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666199 is an equidigital number, since it uses as much as digits as its factorization.

55666199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 47.

The square root of 55666199 is about 7460.9784210920. The cubic root of 55666199 is about 381.8245564609.

The spelling of 55666199 in words is "fifty-five million, six hundred sixty-six thousand, one hundred ninety-nine".