66268823 has 4 divisors (see below), whose sum is σ = 66449760. Its totient is φ = 66087888.

The previous prime is 66268817. The next prime is 66268831. The reversal of 66268823 is 32886266.

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 66268823 - 2⁶ = 66268759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66268883) 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 in 3 ways as a sum of consecutive naturals, for example, 89918 + ... + 90651.

It is an arithmetic number, because the mean of its divisors is an integer number (16612440).

Almost surely, 2^66268823 is an apocalyptic number.

66268823 is a deficient number, since it is larger than the sum of its proper divisors (180937).

66268823 is a wasteful number, since it uses less digits than its factorization.

66268823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180936.

The product of its digits is 165888, while the sum is 41.

The square root of 66268823 is about 8140.5665036286. The cubic root of 66268823 is about 404.6719347024.

The spelling of 66268823 in words is "sixty-six million, two hundred sixty-eight thousand, eight hundred twenty-three".