122217666 has 16 divisors (see below), whose sum is σ = 247381344. Its totient is φ = 40248224.

The previous prime is 122217659. The next prime is 122217677. The reversal of 122217666 is 666712221.

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, 122211 + ... + 123206.

It is an arithmetic number, because the mean of its divisors is an integer number (15461334).

Almost surely, 2^122217666 is an apocalyptic number.

122217666 is an abundant number, since it is smaller than the sum of its proper divisors (125163678).

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

122217666 is a wasteful number, since it uses less digits than its factorization.

122217666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245505.

The product of its digits is 12096, while the sum is 33.

The square root of 122217666 is about 11055.2099030276. The cubic root of 122217666 is about 496.2623509120.

Adding to 122217666 its reverse (666712221), we get a palindrome (788929887).

The spelling of 122217666 in words is "one hundred twenty-two million, two hundred seventeen thousand, six hundred sixty-six".