166405411 has 4 divisors (see below), whose sum is σ = 166476024. Its totient is φ = 166334800.

The previous prime is 166405409. The next prime is 166405417. The reversal of 166405411 is 114504661.

166405411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 166405411 - 2¹ = 166405409 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 166405411.

It is not an unprimeable number, because it can be changed into a prime (166405417) 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, 31645 + ... + 36526.

It is an arithmetic number, because the mean of its divisors is an integer number (41619006).

Almost surely, 2^166405411 is an apocalyptic number.

166405411 is a deficient number, since it is larger than the sum of its proper divisors (70613).

166405411 is an equidigital number, since it uses as much as digits as its factorization.

166405411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70612.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 166405411 is about 12899.8221305567. The cubic root of 166405411 is about 550.0335087022.

The spelling of 166405411 in words is "one hundred sixty-six million, four hundred five thousand, four hundred eleven".