216367667 has 4 divisors (see below), whose sum is σ = 217695240. Its totient is φ = 215040096.

The previous prime is 216367651. The next prime is 216367681. The reversal of 216367667 is 766763612.

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

It is a cyclic number.

It is not a de Polignac number, because 216367667 - 2⁴ = 216367651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216367867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663542 + ... + 663867.

It is an arithmetic number, because the mean of its divisors is an integer number (54423810).

Almost surely, 2^216367667 is an apocalyptic number.

216367667 is a deficient number, since it is larger than the sum of its proper divisors (1327573).

216367667 is a wasteful number, since it uses less digits than its factorization.

216367667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327572.

The product of its digits is 381024, while the sum is 44.

The square root of 216367667 is about 14709.4414237931. The cubic root of 216367667 is about 600.3402394328.

The spelling of 216367667 in words is "two hundred sixteen million, three hundred sixty-seven thousand, six hundred sixty-seven".