2166912017 has 4 divisors (see below), whose sum is σ = 2213016576. Its totient is φ = 2120807460.

The previous prime is 2166911983. The next prime is 2166912023. The reversal of 2166912017 is 7102196612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166912017 - 2¹⁶ = 2166846481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166912037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23052209 + ... + 23052302.

It is an arithmetic number, because the mean of its divisors is an integer number (553254144).

Almost surely, 2^2166912017 is an apocalyptic number.

It is an amenable number.

2166912017 is a deficient number, since it is larger than the sum of its proper divisors (46104559).

2166912017 is an equidigital number, since it uses as much as digits as its factorization.

2166912017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46104558.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2166912017 is about 46550.1022233034. The cubic root of 2166912017 is about 1294.0381874531.

The spelling of 2166912017 in words is "two billion, one hundred sixty-six million, nine hundred twelve thousand, seventeen".