66662266 has 16 divisors (see below), whose sum is σ = 109487520. Its totient is φ = 30188880.

The previous prime is 66662261. The next prime is 66662291. The reversal of 66662266 is 66226666.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66662261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (6842970).

It is a self-describing number.

Almost surely, 2^66662266 is an apocalyptic number.

66662266 is a deficient number, since it is larger than the sum of its proper divisors (42825254).

66662266 is a wasteful number, since it uses less digits than its factorization.

66662266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229.

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

The square root of 66662266 is about 8164.6963201334. The cubic root of 66662266 is about 405.4712109274.

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

The spelling of 66662266 in words is "sixty-six million, six hundred sixty-two thousand, two hundred sixty-six".