216887667 has 8 divisors (see below), whose sum is σ = 289906320. Its totient is φ = 144230400.

The previous prime is 216887651. The next prime is 216887707. The reversal of 216887667 is 766788612.

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

It is not a de Polignac number, because 216887667 - 2⁴ = 216887651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216887467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88942 + ... + 91347.

It is an arithmetic number, because the mean of its divisors is an integer number (36238290).

Almost surely, 2^216887667 is an apocalyptic number.

216887667 is a deficient number, since it is larger than the sum of its proper divisors (73018653).

216887667 is a wasteful number, since it uses less digits than its factorization.

216887667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180693.

The product of its digits is 1354752, while the sum is 51.

The square root of 216887667 is about 14727.1065386246. The cubic root of 216887667 is about 600.8207905483.

The spelling of 216887667 in words is "two hundred sixteen million, eight hundred eighty-seven thousand, six hundred sixty-seven".