8139966451 has 2 divisors, whose sum is σ = 8139966452. Its totient is φ = 8139966450.

The previous prime is 8139966449. The next prime is 8139966463. The reversal of 8139966451 is 1546699318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8139966451 - 2¹ = 8139966449 is a prime.

Together with 8139966449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8139966421) 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, 4069983225 + 4069983226.

It is an arithmetic number, because the mean of its divisors is an integer number (4069983226).

Almost surely, 2^8139966451 is an apocalyptic number.

8139966451 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139966451 is an equidigital number, since it uses as much as digits as its factorization.

8139966451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 52.

The square root of 8139966451 is about 90221.7626241031. The cubic root of 8139966451 is about 2011.5965015357.

The spelling of 8139966451 in words is "eight billion, one hundred thirty-nine million, nine hundred sixty-six thousand, four hundred fifty-one".