216666467 has 8 divisors (see below), whose sum is σ = 221298480. Its totient is φ = 212066560.

The previous prime is 216666451. The next prime is 216666469. The reversal of 216666467 is 764666612.

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

It is a cyclic number.

It is not a de Polignac number, because 216666467 - 2⁴ = 216666451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216666469) 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 7 ways as a sum of consecutive naturals, for example, 5867 + ... + 21627.

It is an arithmetic number, because the mean of its divisors is an integer number (27662310).

Almost surely, 2^216666467 is an apocalyptic number.

216666467 is a deficient number, since it is larger than the sum of its proper divisors (4632013).

216666467 is a wasteful number, since it uses less digits than its factorization.

216666467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16053.

The product of its digits is 435456, while the sum is 44.

The square root of 216666467 is about 14719.5946615387. The cubic root of 216666467 is about 600.6164654744.

The spelling of 216666467 in words is "two hundred sixteen million, six hundred sixty-six thousand, four hundred sixty-seven".