208218966 has 16 divisors (see below), whose sum is σ = 417075888. Its totient is φ = 69300000.

The previous prime is 208218947. The next prime is 208218973. The reversal of 208218966 is 669812802.

208218966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22285 + ... + 30216.

It is an arithmetic number, because the mean of its divisors is an integer number (26067243).

Almost surely, 2^208218966 is an apocalyptic number.

208218966 is an abundant number, since it is smaller than the sum of its proper divisors (208856922).

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

208218966 is a wasteful number, since it uses less digits than its factorization.

208218966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53167.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 208218966 is about 14429.7943852295. The cubic root of 208218966 is about 592.7070529182.

The spelling of 208218966 in words is "two hundred eight million, two hundred eighteen thousand, nine hundred sixty-six".