166416031603243 has 2 divisors, whose sum is σ = 166416031603244. Its totient is φ = 166416031603242.

The previous prime is 166416031603219. The next prime is 166416031603273. The reversal of 166416031603243 is 342306130614661.

166416031603243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166416031603243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166416031603193 and 166416031603202.

It is not a weakly prime, because it can be changed into another prime (166416031603273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83208015801621 + 83208015801622.

It is an arithmetic number, because the mean of its divisors is an integer number (83208015801622).

Almost surely, 2^{166416031603243} is an apocalyptic number.

166416031603243 is a deficient number, since it is larger than the sum of its proper divisors (1).

166416031603243 is an equidigital number, since it uses as much as digits as its factorization.

166416031603243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 166416031603243 in words is "one hundred sixty-six trillion, four hundred sixteen billion, thirty-one million, six hundred three thousand, two hundred forty-three".