66226667 has 4 divisors (see below), whose sum is σ = 71321040. Its totient is φ = 61132296.

The previous prime is 66226651. The next prime is 66226697. The reversal of 66226667 is 76662266.

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 66226667 - 2⁴ = 66226651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66226697) 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, 2547167 + ... + 2547192.

It is an arithmetic number, because the mean of its divisors is an integer number (17830260).

Almost surely, 2^66226667 is an apocalyptic number.

66226667 is a deficient number, since it is larger than the sum of its proper divisors (5094373).

66226667 is a wasteful number, since it uses less digits than its factorization.

66226667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094372.

The product of its digits is 217728, while the sum is 41.

The square root of 66226667 is about 8137.9768370277. The cubic root of 66226667 is about 404.5861076728.

The spelling of 66226667 in words is "sixty-six million, two hundred twenty-six thousand, six hundred sixty-seven".