7166891 has 2 divisors, whose sum is σ = 7166892. Its totient is φ = 7166890.

The previous prime is 7166867. The next prime is 7166897. The reversal of 7166891 is 1986617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7166891 - 2⁶ = 7166827 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7166897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3583445 + 3583446.

It is an arithmetic number, because the mean of its divisors is an integer number (3583446).

Almost surely, 2^7166891 is an apocalyptic number.

7166891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7166891 is an equidigital number, since it uses as much as digits as its factorization.

7166891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 7166891 is about 2677.1049661902. The cubic root of 7166891 is about 192.8014369911.

The spelling of 7166891 in words is "seven million, one hundred sixty-six thousand, eight hundred ninety-one".