166243804 has 18 divisors (see below), whose sum is σ = 293029800. Its totient is φ = 82523232.

The previous prime is 166243733. The next prime is 166243811. The reversal of 166243804 is 408342661.

It is a self number, because there is not a number n which added to its sum of digits gives 166243804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363544 + ... + 364000.

Almost surely, 2^166243804 is an apocalyptic number.

It is an amenable number.

166243804 is a deficient number, since it is larger than the sum of its proper divisors (126785996).

166243804 is an equidigital number, since it uses as much as digits as its factorization.

166243804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 166243804 is about 12893.5566854146. The cubic root of 166243804 is about 549.8553933882.

The spelling of 166243804 in words is "one hundred sixty-six million, two hundred forty-three thousand, eight hundred four".