166241903 has 2 divisors, whose sum is σ = 166241904. Its totient is φ = 166241902.

The previous prime is 166241899. The next prime is 166241909. The reversal of 166241903 is 309142661.

It is a weak prime.

It is an emirp because it is prime and its reverse (309142661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166241903 - 2² = 166241899 is a prime.

It is a super-2 number, since 2×166241903² = 55272740626122818, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166241903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166241909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83120951 + 83120952.

It is an arithmetic number, because the mean of its divisors is an integer number (83120952).

Almost surely, 2^166241903 is an apocalyptic number.

166241903 is a deficient number, since it is larger than the sum of its proper divisors (1).

166241903 is an equidigital number, since it uses as much as digits as its factorization.

166241903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 166241903 is about 12893.4829662120. The cubic root of 166241903 is about 549.8532975124.

The spelling of 166241903 in words is "one hundred sixty-six million, two hundred forty-one thousand, nine hundred three".