220266866 has 4 divisors (see below), whose sum is σ = 330400302. Its totient is φ = 110133432.

The previous prime is 220266857. The next prime is 220266869. The reversal of 220266866 is 668662022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 209409841 + 10857025 = 14471^2 + 3295^2 .

It is not an unprimeable number, because it can be changed into a prime (220266869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55066715 + ... + 55066718.

Almost surely, 2^220266866 is an apocalyptic number.

220266866 is a deficient number, since it is larger than the sum of its proper divisors (110133436).

220266866 is a wasteful number, since it uses less digits than its factorization.

220266866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110133435.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 220266866 is about 14841.3902987557. The cubic root of 220266866 is about 603.9250689175.

The spelling of 220266866 in words is "two hundred twenty million, two hundred sixty-six thousand, eight hundred sixty-six".