166845020603 has 2 divisors, whose sum is σ = 166845020604. Its totient is φ = 166845020602.

The previous prime is 166845020539. The next prime is 166845020669. The reversal of 166845020603 is 306020548661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166845020603 - 2⁶ = 166845020539 is a prime.

It is not a weakly prime, because it can be changed into another prime (166845020003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83422510301 + 83422510302.

It is an arithmetic number, because the mean of its divisors is an integer number (83422510302).

Almost surely, 2^166845020603 is an apocalyptic number.

166845020603 is a deficient number, since it is larger than the sum of its proper divisors (1).

166845020603 is an equidigital number, since it uses as much as digits as its factorization.

166845020603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 166845020603 in words is "one hundred sixty-six billion, eight hundred forty-five million, twenty thousand, six hundred three".