6665049 has 6 divisors (see below), whose sum is σ = 9627306. Its totient is φ = 4443360.

The previous prime is 6665047. The next prime is 6665051. The reversal of 6665049 is 9405666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6665047) and next prime (6665051).

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 8649 = 2580^2 + 93^2 .

It is not a de Polignac number, because 6665049 - 2¹ = 6665047 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6665047) 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 5 ways as a sum of consecutive naturals, for example, 370272 + ... + 370289.

It is an arithmetic number, because the mean of its divisors is an integer number (1604551).

Almost surely, 2^6665049 is an apocalyptic number.

It is an amenable number.

6665049 is a deficient number, since it is larger than the sum of its proper divisors (2962257).

6665049 is a wasteful number, since it uses less digits than its factorization.

6665049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740567 (or 740564 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6665049 is about 2581.6756186632. The cubic root of 6665049 is about 188.1919817186.

The spelling of 6665049 in words is "six million, six hundred sixty-five thousand, forty-nine".