166895856053 has 4 divisors (see below), whose sum is σ = 166992833868. Its totient is φ = 166798878240.

The previous prime is 166895855983. The next prime is 166895856059. The reversal of 166895856053 is 350658598661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82680976849 + 84214879204 = 287543^2 + 290198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166895856053 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 (166895856059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48486326 + ... + 48489767.

It is an arithmetic number, because the mean of its divisors is an integer number (41748208467).

Almost surely, 2^166895856053 is an apocalyptic number.

It is an amenable number.

166895856053 is a deficient number, since it is larger than the sum of its proper divisors (96977815).

166895856053 is an equidigital number, since it uses as much as digits as its factorization.

166895856053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96977814.

The product of its (nonzero) digits is 46656000, while the sum is 62.

The spelling of 166895856053 in words is "one hundred sixty-six billion, eight hundred ninety-five million, eight hundred fifty-six thousand, fifty-three".