166540011 has 32 divisors (see below), whose sum is σ = 253221120. Its totient is φ = 96432000.

The previous prime is 166540009. The next prime is 166540013. The reversal of 166540011 is 110045661.

It is an interprime number because it is at equal distance from previous prime (166540009) and next prime (166540013).

It is not a de Polignac number, because 166540011 - 2¹ = 166540009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166540013) 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 31 ways as a sum of consecutive naturals, for example, 95796 + ... + 97518.

It is an arithmetic number, because the mean of its divisors is an integer number (7913160).

Almost surely, 2^166540011 is an apocalyptic number.

166540011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166540011 is a deficient number, since it is larger than the sum of its proper divisors (86681109).

166540011 is a wasteful number, since it uses less digits than its factorization.

166540011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 166540011 is about 12905.0382021906. The cubic root of 166540011 is about 550.1817702229.

Adding to 166540011 its reverse (110045661), we get a palindrome (276585672).

The spelling of 166540011 in words is "one hundred sixty-six million, five hundred forty thousand, eleven".