166670203543 has 2 divisors, whose sum is σ = 166670203544. Its totient is φ = 166670203542.

The previous prime is 166670203517. The next prime is 166670203577. The reversal of 166670203543 is 345302076661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166670203543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166670203543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166670003543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83335101771 + 83335101772.

It is an arithmetic number, because the mean of its divisors is an integer number (83335101772).

Almost surely, 2^166670203543 is an apocalyptic number.

166670203543 is a deficient number, since it is larger than the sum of its proper divisors (1).

166670203543 is an equidigital number, since it uses as much as digits as its factorization.

166670203543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 166670203543 in words is "one hundred sixty-six billion, six hundred seventy million, two hundred three thousand, five hundred forty-three".