2066649 has 16 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 1204416.

The previous prime is 2066641. The next prime is 2066653. The reversal of 2066649 is 9466602.

It is not a de Polignac number, because 2066649 - 2³ = 2066641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066641) 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, 654 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^2066649 is an apocalyptic number.

It is an amenable number.

2066649 is a deficient number, since it is larger than the sum of its proper divisors (1058151).

2066649 is a wasteful number, since it uses less digits than its factorization.

2066649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 2066649 is about 1437.5844323030. The cubic root of 2066649 is about 127.3763815293.

The spelling of 2066649 in words is "two million, sixty-six thousand, six hundred forty-nine".