166496641573 has 2 divisors, whose sum is σ = 166496641574. Its totient is φ = 166496641572.

The previous prime is 166496641501. The next prime is 166496641651. The reversal of 166496641573 is 375146694661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130857998049 + 35638643524 = 361743^2 + 188782^2 .

It is an emirp because it is prime and its reverse (375146694661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166496641573 - 2⁹ = 166496641061 is a prime.

It is a super-2 number, since 2×166496641573² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166496641273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83248320786 + 83248320787.

It is an arithmetic number, because the mean of its divisors is an integer number (83248320787).

Almost surely, 2^166496641573 is an apocalyptic number.

It is an amenable number.

166496641573 is a deficient number, since it is larger than the sum of its proper divisors (1).

166496641573 is an equidigital number, since it uses as much as digits as its factorization.

166496641573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 58.

The spelling of 166496641573 in words is "one hundred sixty-six billion, four hundred ninety-six million, six hundred forty-one thousand, five hundred seventy-three".