6654391749 has 6 divisors (see below), whose sum is σ = 9611899206. Its totient is φ = 4436261160.

The previous prime is 6654391697. The next prime is 6654391801. The reversal of 6654391749 is 9471934566.

6654391749 is a `hidden beast` number, since 6 + 6 + 543 + 91 + 7 + 4 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (6654391697) and next prime (6654391801).

It can be written as a sum of positive squares in only one way, i.e., 4042670724 + 2611721025 = 63582^2 + 51105^2 .

It is not a de Polignac number, because 6654391749 - 2⁷ = 6654391621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6654391695 and 6654391704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6654390749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369688422 + ... + 369688439.

It is an arithmetic number, because the mean of its divisors is an integer number (1601983201).

Almost surely, 2^6654391749 is an apocalyptic number.

It is an amenable number.

6654391749 is a deficient number, since it is larger than the sum of its proper divisors (2957507457).

6654391749 is a wasteful number, since it uses less digits than its factorization.

6654391749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739376867 (or 739376864 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 6654391749 is about 81574.4552479512. The cubic root of 6654391749 is about 1880.9162341119.

The spelling of 6654391749 in words is "six billion, six hundred fifty-four million, three hundred ninety-one thousand, seven hundred forty-nine".