99668626193 has 2 divisors, whose sum is σ = 99668626194. Its totient is φ = 99668626192.

The previous prime is 99668626153. The next prime is 99668626219. The reversal of 99668626193 is 39162686699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79372919824 + 20295706369 = 281732^2 + 142463^2 .

It is a cyclic number.

It is not a de Polignac number, because 99668626193 - 2¹⁴ = 99668609809 is a prime.

It is not a weakly prime, because it can be changed into another prime (99668626153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49834313096 + 49834313097.

It is an arithmetic number, because the mean of its divisors is an integer number (49834313097).

Almost surely, 2^99668626193 is an apocalyptic number.

It is an amenable number.

99668626193 is a deficient number, since it is larger than the sum of its proper divisors (1).

99668626193 is an equidigital number, since it uses as much as digits as its factorization.

99668626193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45349632, while the sum is 65.

The spelling of 99668626193 in words is "ninety-nine billion, six hundred sixty-eight million, six hundred twenty-six thousand, one hundred ninety-three".