66214123 has 4 divisors (see below), whose sum is σ = 66260608. Its totient is φ = 66167640.

The previous prime is 66214111. The next prime is 66214129. The reversal of 66214123 is 32141266.

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 66214123 - 2⁵ = 66214091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66214129) 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, 21036 + ... + 23977.

It is an arithmetic number, because the mean of its divisors is an integer number (16565152).

Almost surely, 2^66214123 is an apocalyptic number.

66214123 is a deficient number, since it is larger than the sum of its proper divisors (46485).

66214123 is a wasteful number, since it uses less digits than its factorization.

66214123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46484.

The product of its digits is 1728, while the sum is 25.

The square root of 66214123 is about 8137.2060930027. The cubic root of 66214123 is about 404.5605618273.

Adding to 66214123 its reverse (32141266), we get a palindrome (98355389).

The spelling of 66214123 in words is "sixty-six million, two hundred fourteen thousand, one hundred twenty-three".