220604666 has 4 divisors (see below), whose sum is σ = 330907002. Its totient is φ = 110302332.

The previous prime is 220604639. The next prime is 220604677. The reversal of 220604666 is 666406022.

220604666 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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., 191130625 + 29474041 = 13825^2 + 5429^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55151165 + ... + 55151168.

Almost surely, 2^220604666 is an apocalyptic number.

220604666 is a deficient number, since it is larger than the sum of its proper divisors (110302336).

220604666 is a wasteful number, since it uses less digits than its factorization.

220604666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110302335.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 220604666 is about 14852.7662743342. The cubic root of 220604666 is about 604.2336365705.

The spelling of 220604666 in words is "two hundred twenty million, six hundred four thousand, six hundred sixty-six".