200166721439 has 2 divisors, whose sum is σ = 200166721440. Its totient is φ = 200166721438.

The previous prime is 200166721361. The next prime is 200166721451. The reversal of 200166721439 is 934127661002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200166721439 - 2¹² = 200166717343 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 200166721396 and 200166721405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200166721499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100083360719 + 100083360720.

It is an arithmetic number, because the mean of its divisors is an integer number (100083360720).

Almost surely, 2^200166721439 is an apocalyptic number.

200166721439 is a deficient number, since it is larger than the sum of its proper divisors (1).

200166721439 is an equidigital number, since it uses as much as digits as its factorization.

200166721439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 200166721439 in words is "two hundred billion, one hundred sixty-six million, seven hundred twenty-one thousand, four hundred thirty-nine".