216670665105 has 48 divisors (see below), whose sum is σ = 388889280000. Its totient is φ = 111464857728.

The previous prime is 216670665073. The next prime is 216670665187. The reversal of 216670665105 is 501566076612.

216670665105 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 70 + 66 + 510 + 5 = 666.

It is not a de Polignac number, because 216670665105 - 2⁵ = 216670665073 is a prime.

It is a super-2 number, since 2×216670665105² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1275996 + ... + 1435794.

It is an arithmetic number, because the mean of its divisors is an integer number (8101860000).

Almost surely, 2^216670665105 is an apocalyptic number.

It is an amenable number.

216670665105 is a deficient number, since it is larger than the sum of its proper divisors (172218614895).

216670665105 is a wasteful number, since it uses less digits than its factorization.

216670665105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160878 (or 160875 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 216670665105 in words is "two hundred sixteen billion, six hundred seventy million, six hundred sixty-five thousand, one hundred five".