216066506 has 8 divisors (see below), whose sum is σ = 324635520. Its totient is φ = 107854668.

The previous prime is 216066503. The next prime is 216066517. The reversal of 216066506 is 605660612.

216066506 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (216066503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87776 + ... + 90203.

It is an arithmetic number, because the mean of its divisors is an integer number (40579440).

Almost surely, 2^216066506 is an apocalyptic number.

216066506 is a deficient number, since it is larger than the sum of its proper divisors (108569014).

216066506 is a wasteful number, since it uses less digits than its factorization.

216066506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178588.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 216066506 is about 14699.2008626320. The cubic root of 216066506 is about 600.0615733106.

The spelling of 216066506 in words is "two hundred sixteen million, sixty-six thousand, five hundred six".