216426066 has 16 divisors (see below), whose sum is σ = 446815488. Its totient is φ = 69814800.

The previous prime is 216426047. The next prime is 216426079. The reversal of 216426066 is 660624612.

216426066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581605 + ... + 581976.

It is an arithmetic number, because the mean of its divisors is an integer number (27925968).

Almost surely, 2^216426066 is an apocalyptic number.

216426066 is an abundant number, since it is smaller than the sum of its proper divisors (230389422).

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

216426066 is a wasteful number, since it uses less digits than its factorization.

216426066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163617.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 216426066 is about 14711.4263754403. The cubic root of 216426066 is about 600.3942464484.

The spelling of 216426066 in words is "two hundred sixteen million, four hundred twenty-six thousand, sixty-six".