2166642415 has 16 divisors (see below), whose sum is σ = 2972151360. Its totient is φ = 1485319680.

The previous prime is 2166642397. The next prime is 2166642431. The reversal of 2166642415 is 5142466612.

It is not a de Polignac number, because 2166642415 - 2⁵ = 2166642383 is a prime.

It is a congruent number.

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, 259831 + ... + 268039.

It is an arithmetic number, because the mean of its divisors is an integer number (185759460).

Almost surely, 2^2166642415 is an apocalyptic number.

2166642415 is a deficient number, since it is larger than the sum of its proper divisors (805508945).

2166642415 is an equidigital number, since it uses as much as digits as its factorization.

2166642415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15762.

The product of its digits is 69120, while the sum is 37.

The square root of 2166642415 is about 46547.2063071459. The cubic root of 2166642415 is about 1293.9845181839.

The spelling of 2166642415 in words is "two billion, one hundred sixty-six million, six hundred forty-two thousand, four hundred fifteen".