166347803 has 2 divisors, whose sum is σ = 166347804. Its totient is φ = 166347802.

The previous prime is 166347749. The next prime is 166347809. The reversal of 166347803 is 308743661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166347803 - 2⁶ = 166347739 is a prime.

It is not a weakly prime, because it can be changed into another prime (166347809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83173901 + 83173902.

It is an arithmetic number, because the mean of its divisors is an integer number (83173902).

Almost surely, 2^166347803 is an apocalyptic number.

166347803 is a deficient number, since it is larger than the sum of its proper divisors (1).

166347803 is an equidigital number, since it uses as much as digits as its factorization.

166347803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 166347803 is about 12897.5890382660. The cubic root of 166347803 is about 549.9700292208.

The spelling of 166347803 in words is "one hundred sixty-six million, three hundred forty-seven thousand, eight hundred three".