166496641601 has 8 divisors (see below), whose sum is σ = 169257489000. Its totient is φ = 163736807040.

The previous prime is 166496641573. The next prime is 166496641651. The reversal of 166496641601 is 106146694661.

It is a Cunningham number, because it is equal to 408040²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 166496641600 = 1^2 + 408040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166496641601 - 2³⁰ = 165422899777 is a prime.

It is a super-2 number, since 2×166496641601² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166496641601.

It is not an unprimeable number, because it can be changed into a prime (166496641651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81935 + ... + 582843.

It is an arithmetic number, because the mean of its divisors is an integer number (21157186125).

Almost surely, 2^166496641601 is an apocalyptic number.

It is an amenable number.

166496641601 is a deficient number, since it is larger than the sum of its proper divisors (2760847399).

166496641601 is an equidigital number, since it uses as much as digits as its factorization.

166496641601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506419.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 166496641601 in words is "one hundred sixty-six billion, four hundred ninety-six million, six hundred forty-one thousand, six hundred one".