199766312699 has 2 divisors, whose sum is σ = 199766312700. Its totient is φ = 199766312698.

The previous prime is 199766312687. The next prime is 199766312723. The reversal of 199766312699 is 996213667991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199766312699 - 2²⁴ = 199749535483 is a prime.

It is not a weakly prime, because it can be changed into another prime (199766312659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99883156349 + 99883156350.

It is an arithmetic number, because the mean of its divisors is an integer number (99883156350).

Almost surely, 2^199766312699 is an apocalyptic number.

199766312699 is a deficient number, since it is larger than the sum of its proper divisors (1).

199766312699 is an equidigital number, since it uses as much as digits as its factorization.

199766312699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 68.

The spelling of 199766312699 in words is "one hundred ninety-nine billion, seven hundred sixty-six million, three hundred twelve thousand, six hundred ninety-nine".