55667491 has 4 divisors (see below), whose sum is σ = 60728184. Its totient is φ = 50606800.

The previous prime is 55667489. The next prime is 55667527. The reversal of 55667491 is 19476655.

55667491 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 a cyclic number.

It is not a de Polignac number, because 55667491 - 2¹ = 55667489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55667431) 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, 2530330 + ... + 2530351.

It is an arithmetic number, because the mean of its divisors is an integer number (15182046).

Almost surely, 2^55667491 is an apocalyptic number.

55667491 is a deficient number, since it is larger than the sum of its proper divisors (5060693).

55667491 is a wasteful number, since it uses less digits than its factorization.

55667491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060692.

The product of its digits is 226800, while the sum is 43.

The square root of 55667491 is about 7461.0650044079. The cubic root of 55667491 is about 381.8275104589.

The spelling of 55667491 in words is "fifty-five million, six hundred sixty-seven thousand, four hundred ninety-one".