166268783 has 2 divisors, whose sum is σ = 166268784. Its totient is φ = 166268782.

The previous prime is 166268749. The next prime is 166268807. The reversal of 166268783 is 387862661.

It is a strong prime.

It is an emirp because it is prime and its reverse (387862661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166268783 - 2¹⁸ = 166006639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166268383) 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, 83134391 + 83134392.

It is an arithmetic number, because the mean of its divisors is an integer number (83134392).

Almost surely, 2^166268783 is an apocalyptic number.

166268783 is a deficient number, since it is larger than the sum of its proper divisors (1).

166268783 is an equidigital number, since it uses as much as digits as its factorization.

166268783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 166268783 is about 12894.5253111543. The cubic root of 166268783 is about 549.8829315574.

The spelling of 166268783 in words is "one hundred sixty-six million, two hundred sixty-eight thousand, seven hundred eighty-three".