2166701885 has 8 divisors (see below), whose sum is σ = 2629256760. Its totient is φ = 1713885184.

The previous prime is 2166701881. The next prime is 2166701897. The reversal of 2166701885 is 5881076612.

It is a happy number.

2166701885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6497401 + 2160204484 = 2549^2 + 46478^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2166701885 - 2² = 2166701881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166701881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434052 + ... + 2434941.

It is an arithmetic number, because the mean of its divisors is an integer number (328657095).

Almost surely, 2^2166701885 is an apocalyptic number.

It is an amenable number.

2166701885 is a deficient number, since it is larger than the sum of its proper divisors (462554875).

2166701885 is an equidigital number, since it uses as much as digits as its factorization.

2166701885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869087.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2166701885 is about 46547.8451166109. The cubic root of 2166701885 is about 1293.9963571711.

The spelling of 2166701885 in words is "two billion, one hundred sixty-six million, seven hundred one thousand, eight hundred eighty-five".