7878266651 has 2 divisors, whose sum is σ = 7878266652. Its totient is φ = 7878266650.

The previous prime is 7878266639. The next prime is 7878266663. The reversal of 7878266651 is 1566628787.

It is a balanced prime because it is at equal distance from previous prime (7878266639) and next prime (7878266663).

It is a cyclic number.

It is not a de Polignac number, because 7878266651 - 2⁶ = 7878266587 is a prime.

It is not a weakly prime, because it can be changed into another prime (7878266611) 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, 3939133325 + 3939133326.

It is an arithmetic number, because the mean of its divisors is an integer number (3939133326).

Almost surely, 2^7878266651 is an apocalyptic number.

7878266651 is the 39695-th centered decagonal number.

7878266651 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878266651 is an equidigital number, since it uses as much as digits as its factorization.

7878266651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 56.

The square root of 7878266651 is about 88759.6003314571. The cubic root of 7878266651 is about 1989.8036599133.

The spelling of 7878266651 in words is "seven billion, eight hundred seventy-eight million, two hundred sixty-six thousand, six hundred fifty-one".