208397222866 has 16 divisors (see below), whose sum is σ = 360935398656. Its totient is φ = 88392341376.

The previous prime is 208397222861. The next prime is 208397222893. The reversal of 208397222866 is 668222793802.

It is a super-2 number, since 2×208397222866² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208397222861) 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, 76728106 + ... + 76730821.

It is an arithmetic number, because the mean of its divisors is an integer number (22558462416).

Almost surely, 2^208397222866 is an apocalyptic number.

208397222866 is a deficient number, since it is larger than the sum of its proper divisors (152538175790).

208397222866 is a wasteful number, since it uses less digits than its factorization.

208397222866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153459033.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 208397222866 in words is "two hundred eight billion, three hundred ninety-seven million, two hundred twenty-two thousand, eight hundred sixty-six".