2166642417 has 8 divisors (see below), whose sum is σ = 2959316640. Its totient is φ = 1409198240.

The previous prime is 2166642397. The next prime is 2166642431. The reversal of 2166642417 is 7142466612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166642417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166642437) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8807367 + ... + 8807612.

It is an arithmetic number, because the mean of its divisors is an integer number (369914580).

Almost surely, 2^2166642417 is an apocalyptic number.

It is an amenable number.

2166642417 is a deficient number, since it is larger than the sum of its proper divisors (792674223).

2166642417 is a wasteful number, since it uses less digits than its factorization.

2166642417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17615023.

The product of its digits is 96768, while the sum is 39.

The square root of 2166642417 is about 46547.2063286294. The cubic root of 2166642417 is about 1293.9845185821.

The spelling of 2166642417 in words is "two billion, one hundred sixty-six million, six hundred forty-two thousand, four hundred seventeen".