66223051 has 4 divisors (see below), whose sum is σ = 66274504. Its totient is φ = 66171600.

The previous prime is 66223043. The next prime is 66223057. The reversal of 66223051 is 15032266.

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 66223051 - 2³ = 66223043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66223057) 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, 23745 + ... + 26386.

It is an arithmetic number, because the mean of its divisors is an integer number (16568626).

Almost surely, 2^66223051 is an apocalyptic number.

66223051 is a deficient number, since it is larger than the sum of its proper divisors (51453).

66223051 is a wasteful number, since it uses less digits than its factorization.

66223051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51452.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66223051 is about 8137.7546657539. The cubic root of 66223051 is about 404.5787440227.

The spelling of 66223051 in words is "sixty-six million, two hundred twenty-three thousand, fifty-one".