166808011 has 6 divisors (see below), whose sum is σ = 175646660. Its totient is φ = 157975308.

The previous prime is 166808009. The next prime is 166808021. The reversal of 166808011 is 110808661.

It is a happy number.

It is not a de Polignac number, because 166808011 - 2¹ = 166808009 is a prime.

It is a super-2 number, since 2×166808011² = 55649825067552242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166808021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54816 + ... + 57778.

Almost surely, 2^166808011 is an apocalyptic number.

166808011 is a deficient number, since it is larger than the sum of its proper divisors (8838649).

166808011 is an frugal number, since it uses more digits than its factorization.

166808011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 166808011 is about 12915.4175697110. The cubic root of 166808011 is about 550.4767337606.

The spelling of 166808011 in words is "one hundred sixty-six million, eight hundred eight thousand, eleven".