216655006 has 4 divisors (see below), whose sum is σ = 324982512. Its totient is φ = 108327502.

The previous prime is 216655003. The next prime is 216655031. The reversal of 216655006 is 600556612.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×216655006⁴ (a number of 34 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216655003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54163750 + ... + 54163753.

It is an arithmetic number, because the mean of its divisors is an integer number (81245628).

Almost surely, 2^216655006 is an apocalyptic number.

216655006 is a deficient number, since it is larger than the sum of its proper divisors (108327506).

216655006 is a wasteful number, since it uses less digits than its factorization.

216655006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108327505.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 216655006 is about 14719.2053453982. The cubic root of 216655006 is about 600.6058750235.

The spelling of 216655006 in words is "two hundred sixteen million, six hundred fifty-five thousand, six".