2066981 has 4 divisors (see below), whose sum is σ = 2362272. Its totient is φ = 1771692.

The previous prime is 2066971. The next prime is 2066989. The reversal of 2066981 is 1896602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066981 is a prime.

It is a super-2 number, since 2×2066981² = 8544820908722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066989) 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, 147635 + ... + 147648.

It is an arithmetic number, because the mean of its divisors is an integer number (590568).

2^2066981 is an apocalyptic number.

It is an amenable number.

2066981 is a deficient number, since it is larger than the sum of its proper divisors (295291).

2066981 is an equidigital number, since it uses as much as digits as its factorization.

2066981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295290.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2066981 is about 1437.6998991445. The cubic root of 2066981 is about 127.3832020221.

The spelling of 2066981 in words is "two million, sixty-six thousand, nine hundred eighty-one".