66858113 has 4 divisors (see below), whose sum is σ = 76409280. Its totient is φ = 57306948.

The previous prime is 66858107. The next prime is 66858133. The reversal of 66858113 is 31185866.

It is a happy number.

66858113 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66858113 - 2⁴ = 66858097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66858133) 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, 4775573 + ... + 4775586.

It is an arithmetic number, because the mean of its divisors is an integer number (19102320).

Almost surely, 2^66858113 is an apocalyptic number.

It is an amenable number.

66858113 is a deficient number, since it is larger than the sum of its proper divisors (9551167).

66858113 is an equidigital number, since it uses as much as digits as its factorization.

66858113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9551166.

The product of its digits is 34560, while the sum is 38.

The square root of 66858113 is about 8176.6810504018. The cubic root of 66858113 is about 405.8679005150.

The spelling of 66858113 in words is "sixty-six million, eight hundred fifty-eight thousand, one hundred thirteen".