6651120673 has 4 divisors (see below), whose sum is σ = 6651625540. Its totient is φ = 6650615808.

The previous prime is 6651120667. The next prime is 6651120709. The reversal of 6651120673 is 3760211566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3760211566 = 2 ⋅1880105783.

It can be written as a sum of positive squares in 2 ways, for example, as 4757826529 + 1893294144 = 68977^2 + 43512^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651120673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651120653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232128 + ... + 259201.

It is an arithmetic number, because the mean of its divisors is an integer number (1662906385).

Almost surely, 2^6651120673 is an apocalyptic number.

It is an amenable number.

6651120673 is a deficient number, since it is larger than the sum of its proper divisors (504867).

6651120673 is a wasteful number, since it uses less digits than its factorization.

6651120673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504866.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6651120673 is about 81554.4031490636. The cubic root of 6651120673 is about 1880.6079851339.

The spelling of 6651120673 in words is "six billion, six hundred fifty-one million, one hundred twenty thousand, six hundred seventy-three".