7166666 has 8 divisors (see below), whose sum is σ = 11576964. Its totient is φ = 3307680.

The previous prime is 7166659. The next prime is 7166689. The reversal of 7166666 is 6666617.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6911641 + 255025 = 2629^2 + 505^2 .

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

It is a super-2 number, since 2×7166666² = 102722203111112, which contains 22 as substring.

7166666 is a modest number, since divided by 6666 gives 716 as remainder.

It is an unprimeable number.

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, 137795 + ... + 137846.

Almost surely, 2^7166666 is an apocalyptic number.

7166666 is a deficient number, since it is larger than the sum of its proper divisors (4410298).

7166666 is a wasteful number, since it uses less digits than its factorization.

7166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275656.

The product of its digits is 54432, while the sum is 38.

The square root of 7166666 is about 2677.0629428536. The cubic root of 7166666 is about 192.7994193436.

The spelling of 7166666 in words is "seven million, one hundred sixty-six thousand, six hundred sixty-six".