166678763 has 2 divisors, whose sum is σ = 166678764. Its totient is φ = 166678762.

The previous prime is 166678741. The next prime is 166678777. The reversal of 166678763 is 367876661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166678763 is a prime.

It is not a weakly prime, because it can be changed into another prime (166678663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83339381 + 83339382.

It is an arithmetic number, because the mean of its divisors is an integer number (83339382).

Almost surely, 2^166678763 is an apocalyptic number.

166678763 is a deficient number, since it is larger than the sum of its proper divisors (1).

166678763 is an equidigital number, since it uses as much as digits as its factorization.

166678763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 166678763 is about 12910.4129678334. The cubic root of 166678763 is about 550.3345215646.

The spelling of 166678763 in words is "one hundred sixty-six million, six hundred seventy-eight thousand, seven hundred sixty-three".