166695903349 has 2 divisors, whose sum is σ = 166695903350. Its totient is φ = 166695903348.

The previous prime is 166695903329. The next prime is 166695903359. The reversal of 166695903349 is 943309596661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162262341124 + 4433562225 = 402818^2 + 66585^2 .

It is an emirp because it is prime and its reverse (943309596661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166695903349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166695903329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83347951674 + 83347951675.

It is an arithmetic number, because the mean of its divisors is an integer number (83347951675).

Almost surely, 2^166695903349 is an apocalyptic number.

It is an amenable number.

166695903349 is a deficient number, since it is larger than the sum of its proper divisors (1).

166695903349 is an equidigital number, since it uses as much as digits as its factorization.

166695903349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28343520, while the sum is 61.

The spelling of 166695903349 in words is "one hundred sixty-six billion, six hundred ninety-five million, nine hundred three thousand, three hundred forty-nine".