216552220466 has 8 divisors (see below), whose sum is σ = 324836381484. Its totient is φ = 108273426640.

The previous prime is 216552220433. The next prime is 216552220483. The reversal of 216552220466 is 664022255612.

It can be written as a sum of positive squares in 2 ways, for example, as 161821957441 + 54730263025 = 402271^2 + 233945^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239365 + ... + 1403256.

Almost surely, 2^216552220466 is an apocalyptic number.

216552220466 is a deficient number, since it is larger than the sum of its proper divisors (108284161018).

216552220466 is a wasteful number, since it uses less digits than its factorization.

216552220466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683596.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 216552220466 in words is "two hundred sixteen billion, five hundred fifty-two million, two hundred twenty thousand, four hundred sixty-six".