6651246139 has 2 divisors, whose sum is σ = 6651246140. Its totient is φ = 6651246138.

The previous prime is 6651246127. The next prime is 6651246181. The reversal of 6651246139 is 9316421566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6651246139 - 2⁷ = 6651246011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6651246095 and 6651246104.

It is not a weakly prime, because it can be changed into another prime (6651226139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325623069 + 3325623070.

It is an arithmetic number, because the mean of its divisors is an integer number (3325623070).

Almost surely, 2^6651246139 is an apocalyptic number.

6651246139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651246139 is an equidigital number, since it uses as much as digits as its factorization.

6651246139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 6651246139 is about 81555.1723620274. The cubic root of 6651246139 is about 1880.6198102528.

The spelling of 6651246139 in words is "six billion, six hundred fifty-one million, two hundred forty-six thousand, one hundred thirty-nine".