2166634 has 4 divisors (see below), whose sum is σ = 3249954. Its totient is φ = 1083316.

The previous prime is 2166629. The next prime is 2166673. The reversal of 2166634 is 4366612.

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

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 837225 = 1153^2 + 915^2 .

It is a d-powerful number, because it can be written as 2²¹ + 1 + 6⁴ + 6⁴ + 6⁵ + 3¹⁰ + 4³ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541657 + ... + 541660.

2^2166634 is an apocalyptic number.

2166634 is a deficient number, since it is larger than the sum of its proper divisors (1083320).

2166634 is a wasteful number, since it uses less digits than its factorization.

2166634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083319.

The product of its digits is 5184, while the sum is 28.

The square root of 2166634 is about 1471.9490480312. The cubic root of 2166634 is about 129.3982842951.

The spelling of 2166634 in words is "two million, one hundred sixty-six thousand, six hundred thirty-four".