216006366 has 16 divisors (see below), whose sum is σ = 432867600. Its totient is φ = 71859648.

The previous prime is 216006359. The next prime is 216006367. The reversal of 216006366 is 663600612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216006367) 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, 32311 + ... + 38418.

It is an arithmetic number, because the mean of its divisors is an integer number (27054225).

Almost surely, 2^216006366 is an apocalyptic number.

216006366 is an abundant number, since it is smaller than the sum of its proper divisors (216861234).

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

216006366 is a wasteful number, since it uses less digits than its factorization.

216006366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71243.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 216006366 is about 14697.1550308214. The cubic root of 216006366 is about 600.0058943865.

Adding to 216006366 its reverse (663600612), we get a palindrome (879606978).

It can be divided in two parts, 21600 and 6366, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 216006366 in words is "two hundred sixteen million, six thousand, three hundred sixty-six".