5665449213 has 24 divisors (see below), whose sum is σ = 8511027200. Its totient is φ = 3628351584.

The previous prime is 5665449211. The next prime is 5665449227. The reversal of 5665449213 is 3129445665.

5665449213 is a `hidden beast` number, since 5 + 6 + 6 + 544 + 92 + 13 = 666.

It is not a de Polignac number, because 5665449213 - 2¹ = 5665449211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665449211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81373 + ... + 133986.

Almost surely, 2^5665449213 is an apocalyptic number.

It is an amenable number.

5665449213 is a deficient number, since it is larger than the sum of its proper divisors (2845577987).

5665449213 is a wasteful number, since it uses less digits than its factorization.

5665449213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215481 (or 215478 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 5665449213 is about 75269.1783733555. The cubic root of 5665449213 is about 1782.6993942469.

The spelling of 5665449213 in words is "five billion, six hundred sixty-five million, four hundred forty-nine thousand, two hundred thirteen".