166776966313 has 2 divisors, whose sum is σ = 166776966314. Its totient is φ = 166776966312.

The previous prime is 166776966263. The next prime is 166776966329. The reversal of 166776966313 is 313669677661.

It is a happy number.

166776966313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166160586384 + 616379929 = 407628^2 + 24827^2 .

It is an emirp because it is prime and its reverse (313669677661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166776966313 - 2²⁹ = 166240095401 is a prime.

It is not a weakly prime, because it can be changed into another prime (166776966353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83388483156 + 83388483157.

It is an arithmetic number, because the mean of its divisors is an integer number (83388483157).

Almost surely, 2^166776966313 is an apocalyptic number.

It is an amenable number.

166776966313 is a deficient number, since it is larger than the sum of its proper divisors (1).

166776966313 is an equidigital number, since it uses as much as digits as its factorization.

166776966313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 61.

The spelling of 166776966313 in words is "one hundred sixty-six billion, seven hundred seventy-six million, nine hundred sixty-six thousand, three hundred thirteen".