2066091 has 4 divisors (see below), whose sum is σ = 2754792. Its totient is φ = 1377392.

The previous prime is 2066083. The next prime is 2066101. The reversal of 2066091 is 1906602.

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

It is a cyclic number.

It is not a de Polignac number, because 2066091 - 2³ = 2066083 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2066081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344346 + ... + 344351.

It is an arithmetic number, because the mean of its divisors is an integer number (688698).

2^2066091 is an apocalyptic number.

2066091 is a deficient number, since it is larger than the sum of its proper divisors (688701).

2066091 is an equidigital number, since it uses as much as digits as its factorization.

2066091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688700.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2066091 is about 1437.3903436436. The cubic root of 2066091 is about 127.3649165250.

The spelling of 2066091 in words is "two million, sixty-six thousand, ninety-one".