2166170401 has 4 divisors (see below), whose sum is σ = 2169550404. Its totient is φ = 2162790400.

The previous prime is 2166170393. The next prime is 2166170467. The reversal of 2166170401 is 1040716612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1782950625 + 383219776 = 42225^2 + 19576^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166170401 - 2³ = 2166170393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166170401.

It is not an unprimeable number, because it can be changed into a prime (2166170471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689040 + ... + 1690321.

It is an arithmetic number, because the mean of its divisors is an integer number (542387601).

Almost surely, 2^2166170401 is an apocalyptic number.

It is an amenable number.

2166170401 is a deficient number, since it is larger than the sum of its proper divisors (3380003).

2166170401 is an equidigital number, since it uses as much as digits as its factorization.

2166170401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380002.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2166170401 is about 46542.1357589013. The cubic root of 2166170401 is about 1293.8905443371.

The spelling of 2166170401 in words is "two billion, one hundred sixty-six million, one hundred seventy thousand, four hundred one".