166233226681 has 8 divisors (see below), whose sum is σ = 172623112704. Its totient is φ = 159907560960.

The previous prime is 166233226673. The next prime is 166233226727. The reversal of 166233226681 is 186622332661.

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 166233226681 - 2³ = 166233226673 is a prime.

It is a super-2 number, since 2×166233226681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166233226381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16049800 + ... + 16060153.

It is an arithmetic number, because the mean of its divisors is an integer number (21577889088).

Almost surely, 2^166233226681 is an apocalyptic number.

It is an amenable number.

166233226681 is a deficient number, since it is larger than the sum of its proper divisors (6389886023).

166233226681 is a wasteful number, since it uses less digits than its factorization.

166233226681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32110151.

The product of its digits is 746496, while the sum is 46.

The spelling of 166233226681 in words is "one hundred sixty-six billion, two hundred thirty-three million, two hundred twenty-six thousand, six hundred eighty-one".