166412611 has 4 divisors (see below), whose sum is σ = 166461592. Its totient is φ = 166363632.

The previous prime is 166412581. The next prime is 166412629. The reversal of 166412611 is 116214661.

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

It is a cyclic number.

It is not a de Polignac number, because 166412611 - 2⁷ = 166412483 is a prime.

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 166412611.

It is not an unprimeable number, because it can be changed into a prime (166412641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18981 + ... + 26326.

It is an arithmetic number, because the mean of its divisors is an integer number (41615398).

Almost surely, 2^166412611 is an apocalyptic number.

166412611 is a deficient number, since it is larger than the sum of its proper divisors (48981).

166412611 is an equidigital number, since it uses as much as digits as its factorization.

166412611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48980.

The product of its digits is 1728, while the sum is 28.

The square root of 166412611 is about 12900.1012011534. The cubic root of 166412611 is about 550.0414415055.

The spelling of 166412611 in words is "one hundred sixty-six million, four hundred twelve thousand, six hundred eleven".