216606026 has 16 divisors (see below), whose sum is σ = 399888384. Its totient is φ = 85690224.

The previous prime is 216605989. The next prime is 216606053. The reversal of 216606026 is 620606612.

216606026 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216606026.

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 7 ways as a sum of consecutive naturals, for example, 594890 + ... + 595253.

It is an arithmetic number, because the mean of its divisors is an integer number (24993024).

Almost surely, 2^216606026 is an apocalyptic number.

216606026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

216606026 is a deficient number, since it is larger than the sum of its proper divisors (183282358).

216606026 is a wasteful number, since it uses less digits than its factorization.

216606026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190165.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 216606026 is about 14717.5414387050. The cubic root of 216606026 is about 600.5606112138.

The spelling of 216606026 in words is "two hundred sixteen million, six hundred six thousand, twenty-six".