166101006065503 has 4 divisors (see below), whose sum is σ = 166795989354720. Its totient is φ = 165406022776288.

The previous prime is 166101006065459. The next prime is 166101006065543. The reversal of 166101006065503 is 305560600101661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166101006065503 - 2⁹ = 166101006064991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166101006065543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347491644250 + ... + 347491644727.

It is an arithmetic number, because the mean of its divisors is an integer number (41698997338680).

Almost surely, 2^{166101006065503} is an apocalyptic number.

166101006065503 is a deficient number, since it is larger than the sum of its proper divisors (694983289217).

166101006065503 is an equidigital number, since it uses as much as digits as its factorization.

166101006065503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694983289216.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 166101006065503 in words is "one hundred sixty-six trillion, one hundred one billion, six million, sixty-five thousand, five hundred three".