66226666 has 32 divisors (see below), whose sum is σ = 116536320. Its totient is φ = 27903600.

The previous prime is 66226651. The next prime is 66226697. The reversal of 66226666 is 66662266.

66226666 is a modest number, since divided by 6666 gives 6622 as remainder.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17961 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (3641760).

It is a self-describing number.

Almost surely, 2^66226666 is an apocalyptic number.

66226666 is a deficient number, since it is larger than the sum of its proper divisors (50309654).

66226666 is a wasteful number, since it uses less digits than its factorization.

66226666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450.

The product of its digits is 186624, while the sum is 40.

The square root of 66226666 is about 8137.9767755874. The cubic root of 66226666 is about 404.5861056364.

Subtracting 66226666 from its reverse (66662266), we obtain a square (435600 = 660²).

The spelling of 66226666 in words is "sixty-six million, two hundred twenty-six thousand, six hundred sixty-six".