2665849 has 2 divisors, whose sum is σ = 2665850. Its totient is φ = 2665848.

The previous prime is 2665843. The next prime is 2665867. The reversal of 2665849 is 9485662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 1140624 = 1235^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665849 - 2³ = 2665841 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2665841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332924 + 1332925.

It is an arithmetic number, because the mean of its divisors is an integer number (1332925).

2^2665849 is an apocalyptic number.

It is an amenable number.

2665849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665849 is an equidigital number, since it uses as much as digits as its factorization.

2665849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 2665849 is about 1632.7427843969. The cubic root of 2665849 is about 138.6580799612.

The spelling of 2665849 in words is "two million, six hundred sixty-five thousand, eight hundred forty-nine".