55667091 has 4 divisors (see below), whose sum is σ = 74222792. Its totient is φ = 37111392.

The previous prime is 55667089. The next prime is 55667123. The reversal of 55667091 is 19076655.

55667091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55667091 - 2¹ = 55667089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55667011) 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 3 ways as a sum of consecutive naturals, for example, 9277846 + ... + 9277851.

It is an arithmetic number, because the mean of its divisors is an integer number (18555698).

Almost surely, 2^55667091 is an apocalyptic number.

55667091 is a deficient number, since it is larger than the sum of its proper divisors (18555701).

55667091 is a wasteful number, since it uses less digits than its factorization.

55667091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18555700.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 55667091 is about 7461.0381985351. The cubic root of 55667091 is about 381.8265959133.

The spelling of 55667091 in words is "fifty-five million, six hundred sixty-seven thousand, ninety-one".