99999888866651 has 2 divisors, whose sum is σ = 99999888866652. Its totient is φ = 99999888866650.

The previous prime is 99999888866627. The next prime is 99999888866693. The reversal of 99999888866651 is 15666888899999.

It is a weak prime.

It is an emirp because it is prime and its reverse (15666888899999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999888866651 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99999888866551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999944433325 + 49999944433326.

It is an arithmetic number, because the mean of its divisors is an integer number (49999944433326).

Almost surely, 2^{99999888866651} is an apocalyptic number.

99999888866651 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999888866651 is an equidigital number, since it uses as much as digits as its factorization.

99999888866651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 261213880320, while the sum is 101.

The spelling of 99999888866651 in words is "ninety-nine trillion, nine hundred ninety-nine billion, eight hundred eighty-eight million, eight hundred sixty-six thousand, six hundred fifty-one".