66226566 has 32 divisors (see below), whose sum is σ = 151856640. Its totient is φ = 18861696.

The previous prime is 66226553. The next prime is 66226583. The reversal of 66226566 is 66562266.

66226566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11815 + ... + 16493.

It is an arithmetic number, because the mean of its divisors is an integer number (4745520).

Almost surely, 2^66226566 is an apocalyptic number.

66226566 is an abundant number, since it is smaller than the sum of its proper divisors (85630074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66226566 is a wasteful number, since it uses less digits than its factorization.

66226566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028.

The product of its digits is 155520, while the sum is 39.

The square root of 66226566 is about 8137.9706315518. The cubic root of 66226566 is about 404.5859019992.

The spelling of 66226566 in words is "sixty-six million, two hundred twenty-six thousand, five hundred sixty-six".