66133823 has 8 divisors (see below), whose sum is σ = 76538880. Its totient is φ = 55968120.

The previous prime is 66133817. The next prime is 66133829. The reversal of 66133823 is 32833166.

It is an interprime number because it is at equal distance from previous prime (66133817) and next prime (66133829).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66133823 - 2⁴ = 66133807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66133823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66133829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59243 + ... + 60348.

It is an arithmetic number, because the mean of its divisors is an integer number (9567360).

Almost surely, 2^66133823 is an apocalyptic number.

66133823 is a deficient number, since it is larger than the sum of its proper divisors (10405057).

66133823 is a wasteful number, since it uses less digits than its factorization.

66133823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119677.

The product of its digits is 15552, while the sum is 32.

The square root of 66133823 is about 8132.2704701701. The cubic root of 66133823 is about 404.3969544635.

Adding to 66133823 its reverse (32833166), we get a palindrome (98966989).

The spelling of 66133823 in words is "sixty-six million, one hundred thirty-three thousand, eight hundred twenty-three".