6566714649 has 18 divisors (see below), whose sum is σ = 10425942618. Its totient is φ = 3979826400.

The previous prime is 6566714641. The next prime is 6566714657. The reversal of 6566714649 is 9464176656.

6566714649 is a `hidden beast` number, since 6 + 566 + 7 + 14 + 64 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (6566714641) and next prime (6566714657).

It can be written as a sum of positive squares in only one way, i.e., 6298803225 + 267911424 = 79365^2 + 16368^2 .

It is not a de Polignac number, because 6566714649 - 2³ = 6566714641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6566714595 and 6566714604.

It is not an unprimeable number, because it can be changed into a prime (6566714641) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3013932 + ... + 3016109.

Almost surely, 2^6566714649 is an apocalyptic number.

It is an amenable number.

6566714649 is a deficient number, since it is larger than the sum of its proper divisors (3859227969).

6566714649 is a wasteful number, since it uses less digits than its factorization.

6566714649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030069 (or 6030055 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 6566714649 is about 81035.2679331660. The cubic root of 6566714649 is about 1872.6188106333.

The spelling of 6566714649 in words is "six billion, five hundred sixty-six million, seven hundred fourteen thousand, six hundred forty-nine".