218468712066 has 24 divisors (see below), whose sum is σ = 480270062832. Its totient is φ = 66202639800.

The previous prime is 218468711977. The next prime is 218468712097. The reversal of 218468712066 is 660217864812.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150459820 + ... + 150461271.

It is an arithmetic number, because the mean of its divisors is an integer number (20011252618).

Almost surely, 2^218468712066 is an apocalyptic number.

218468712066 is an abundant number, since it is smaller than the sum of its proper divisors (261801350766).

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

218468712066 is a wasteful number, since it uses less digits than its factorization.

218468712066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300921118 (or 300921107 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 218468712066 in words is "two hundred eighteen billion, four hundred sixty-eight million, seven hundred twelve thousand, sixty-six".