214165665 has 24 divisors (see below), whose sum is σ = 424252608. Its totient is φ = 97904160.

The previous prime is 214165631. The next prime is 214165681. The reversal of 214165665 is 566561412.

It is not a de Polignac number, because 214165665 - 2⁹ = 214165153 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 339631 + ... + 340260.

It is an arithmetic number, because the mean of its divisors is an integer number (17677192).

Almost surely, 2^214165665 is an apocalyptic number.

It is an amenable number.

214165665 is a deficient number, since it is larger than the sum of its proper divisors (210086943).

214165665 is a wasteful number, since it uses less digits than its factorization.

214165665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679909 (or 679906 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 214165665 is about 14634.4000560324. The cubic root of 214165665 is about 598.2967109194.

The spelling of 214165665 in words is "two hundred fourteen million, one hundred sixty-five thousand, six hundred sixty-five".