66622123 has 4 divisors (see below), whose sum is σ = 66657640. Its totient is φ = 66586608.

The previous prime is 66622121. The next prime is 66622169. The reversal of 66622123 is 32122666.

It is a happy number.

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 66622123 - 2¹ = 66622121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66622091 and 66622100.

It is not an unprimeable number, because it can be changed into a prime (66622121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14778 + ... + 18751.

It is an arithmetic number, because the mean of its divisors is an integer number (16664410).

Almost surely, 2^66622123 is an apocalyptic number.

66622123 is a deficient number, since it is larger than the sum of its proper divisors (35517).

66622123 is a wasteful number, since it uses less digits than its factorization.

66622123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35516.

The product of its digits is 5184, while the sum is 28.

The square root of 66622123 is about 8162.2376221230. The cubic root of 66622123 is about 405.3898050581.

Adding to 66622123 its reverse (32122666), we get a palindrome (98744789).

The spelling of 66622123 in words is "sixty-six million, six hundred twenty-two thousand, one hundred twenty-three".