7166405 has 8 divisors (see below), whose sum is σ = 8617752. Its totient is φ = 5721088.

The previous prime is 7166389. The next prime is 7166407. The reversal of 7166405 is 5046617.

It can be written as a sum of positive squares in 4 ways, for example, as 2910436 + 4255969 = 1706^2 + 2063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7166405 - 2⁴ = 7166389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7166407) 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 7 ways as a sum of consecutive naturals, for example, 1757 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (1077219).

Almost surely, 2^7166405 is an apocalyptic number.

It is an amenable number.

7166405 is a deficient number, since it is larger than the sum of its proper divisors (1451347).

7166405 is a wasteful number, since it uses less digits than its factorization.

7166405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 7166405 is about 2677.0141949568. The cubic root of 7166405 is about 192.7970788197.

The spelling of 7166405 in words is "seven million, one hundred sixty-six thousand, four hundred five".