216714665 has 8 divisors (see below), whose sum is σ = 273744960. Its totient is φ = 164246832.

The previous prime is 216714653. The next prime is 216714679. The reversal of 216714665 is 566417612.

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 216714665 - 2¹⁴ = 216698281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140509 + ... + 1140698.

It is an arithmetic number, because the mean of its divisors is an integer number (34218120).

Almost surely, 2^216714665 is an apocalyptic number.

It is an amenable number.

216714665 is a deficient number, since it is larger than the sum of its proper divisors (57030295).

216714665 is a wasteful number, since it uses less digits than its factorization.

216714665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281231.

The product of its digits is 60480, while the sum is 38.

The square root of 216714665 is about 14721.2317759079. The cubic root of 216714665 is about 600.6609983863.

The spelling of 216714665 in words is "two hundred sixteen million, seven hundred fourteen thousand, six hundred sixty-five".