66919050199 has 2 divisors, whose sum is σ = 66919050200. Its totient is φ = 66919050198.

The previous prime is 66919050181. The next prime is 66919050281. The reversal of 66919050199 is 99105091966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66919050199 - 2¹⁹ = 66918525911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66919050109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33459525099 + 33459525100.

It is an arithmetic number, because the mean of its divisors is an integer number (33459525100).

Almost surely, 2^66919050199 is an apocalyptic number.

66919050199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66919050199 is an equidigital number, since it uses as much as digits as its factorization.

66919050199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1180980, while the sum is 55.

The spelling of 66919050199 in words is "sixty-six billion, nine hundred nineteen million, fifty thousand, one hundred ninety-nine".