166640363 has 2 divisors, whose sum is σ = 166640364. Its totient is φ = 166640362.

The previous prime is 166640311. The next prime is 166640377. The reversal of 166640363 is 363046661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166640363 is a prime.

It is not a weakly prime, because it can be changed into another prime (166640303) 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, 83320181 + 83320182.

It is an arithmetic number, because the mean of its divisors is an integer number (83320182).

Almost surely, 2^166640363 is an apocalyptic number.

166640363 is a deficient number, since it is larger than the sum of its proper divisors (1).

166640363 is an equidigital number, since it uses as much as digits as its factorization.

166640363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 166640363 is about 12908.9257105307. The cubic root of 166640363 is about 550.2922556947.

The spelling of 166640363 in words is "one hundred sixty-six million, six hundred forty thousand, three hundred sixty-three".