166091411 has 4 divisors (see below), whose sum is σ = 175861512. Its totient is φ = 156321312.

The previous prime is 166091389. The next prime is 166091447. The reversal of 166091411 is 114190661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166091411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166091011) 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, 4885025 + ... + 4885058.

It is an arithmetic number, because the mean of its divisors is an integer number (43965378).

Almost surely, 2^166091411 is an apocalyptic number.

166091411 is a deficient number, since it is larger than the sum of its proper divisors (9770101).

166091411 is an equidigital number, since it uses as much as digits as its factorization.

166091411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9770100.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 166091411 is about 12887.6456732795. The cubic root of 166091411 is about 549.6873275150.

The spelling of 166091411 in words is "one hundred sixty-six million, ninety-one thousand, four hundred eleven".