216860066 has 8 divisors (see below), whose sum is σ = 335783424. Its totient is φ = 104932260.

The previous prime is 216860027. The next prime is 216860089. The reversal of 216860066 is 660068612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748810 + ... + 1748933.

It is an arithmetic number, because the mean of its divisors is an integer number (41972928).

Almost surely, 2^216860066 is an apocalyptic number.

216860066 is a deficient number, since it is larger than the sum of its proper divisors (118923358).

216860066 is a wasteful number, since it uses less digits than its factorization.

216860066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497776.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 216860066 is about 14726.1694272475. The cubic root of 216860066 is about 600.7953027642.

The spelling of 216860066 in words is "two hundred sixteen million, eight hundred sixty thousand, sixty-six".