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2666161 = 17156833
BaseRepresentation
bin1010001010111010110001
312000110021201
422022322301
51140304121
6133051201
731443031
oct12127261
95013251
102666161
111561143
12a86b01
13724714
144d58c1
15379e91
hex28aeb1

2666161 has 4 divisors (see below), whose sum is σ = 2823012. Its totient is φ = 2509312.

The previous prime is 2666141. The next prime is 2666177. The reversal of 2666161 is 1616662.

2666161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1299600 + 1366561 = 1140^2 + 1169^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666161 - 217 = 2535089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666101) 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, 78400 + ... + 78433.

It is an arithmetic number, because the mean of its divisors is an integer number (705753).

22666161 is an apocalyptic number.

It is an amenable number.

2666161 is a deficient number, since it is larger than the sum of its proper divisors (156851).

2666161 is a wasteful number, since it uses less digits than its factorization.

2666161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156850.

The product of its digits is 2592, while the sum is 28.

The square root of 2666161 is about 1632.8383263508. The cubic root of 2666161 is about 138.6634890739.

The spelling of 2666161 in words is "two million, six hundred sixty-six thousand, one hundred sixty-one".

Divisors: 1 17 156833 2666161