2666217195 has 16 divisors (see below), whose sum is σ = 4739941920. Its totient is φ = 1421982432.

The previous prime is 2666217157. The next prime is 2666217223. The reversal of 2666217195 is 5917126662.

It is not a de Polignac number, because 2666217195 - 2⁶ = 2666217131 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2666217195.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9874744 + ... + 9875013.

It is an arithmetic number, because the mean of its divisors is an integer number (296246370).

Almost surely, 2^2666217195 is an apocalyptic number.

2666217195 is a deficient number, since it is larger than the sum of its proper divisors (2073724725).

2666217195 is a wasteful number, since it uses less digits than its factorization.

2666217195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19749771 (or 19749765 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 2666217195 is about 51635.4257753337. The cubic root of 2666217195 is about 1386.6446327616.

The spelling of 2666217195 in words is "two billion, six hundred sixty-six million, two hundred seventeen thousand, one hundred ninety-five".