2066491 has 16 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 1679040.

The previous prime is 2066473. The next prime is 2066501. The reversal of 2066491 is 1946602.

It is a cyclic number.

It is not a de Polignac number, because 2066491 - 2¹¹ = 2064443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19260 + ... + 19366.

It is an arithmetic number, because the mean of its divisors is an integer number (155520).

2^2066491 is an apocalyptic number.

2066491 is a deficient number, since it is larger than the sum of its proper divisors (421829).

2066491 is a wasteful number, since it uses less digits than its factorization.

2066491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

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

The square root of 2066491 is about 1437.5294779586. The cubic root of 2066491 is about 127.3731353755.

The spelling of 2066491 in words is "two million, sixty-six thousand, four hundred ninety-one".