55166959 has 2 divisors, whose sum is σ = 55166960. Its totient is φ = 55166958.

The previous prime is 55166957. The next prime is 55166977. The reversal of 55166959 is 95966155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55166959 - 2¹ = 55166957 is a prime.

Together with 55166957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55166957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27583479 + 27583480.

It is an arithmetic number, because the mean of its divisors is an integer number (27583480).

Almost surely, 2^55166959 is an apocalyptic number.

55166959 is a deficient number, since it is larger than the sum of its proper divisors (1).

55166959 is an equidigital number, since it uses as much as digits as its factorization.

55166959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 46.

The square root of 55166959 is about 7427.4463310077. The cubic root of 55166959 is about 380.6796677402.

The spelling of 55166959 in words is "fifty-five million, one hundred sixty-six thousand, nine hundred fifty-nine".