102218666 has 32 divisors (see below), whose sum is σ = 170527680. Its totient is φ = 45568000.

The previous prime is 102218659. The next prime is 102218713. The reversal of 102218666 is 666812201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397610 + ... + 397866.

It is an arithmetic number, because the mean of its divisors is an integer number (5328990).

Almost surely, 2^102218666 is an apocalyptic number.

102218666 is a deficient number, since it is larger than the sum of its proper divisors (68309014).

102218666 is a wasteful number, since it uses less digits than its factorization.

102218666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 102218666 is about 10110.3247227772. The cubic root of 102218666 is about 467.5665166967.

The spelling of 102218666 in words is "one hundred two million, two hundred eighteen thousand, six hundred sixty-six".