7116661 has 4 divisors (see below), whose sum is σ = 7168000. Its totient is φ = 7065324.

The previous prime is 7116649. The next prime is 7116667. The reversal of 7116661 is 1666117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1666117 = 41 ⋅40637.

It is a cyclic number.

It is not a de Polignac number, because 7116661 - 2⁷ = 7116533 is a prime.

It is a Duffinian number.

7116661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7116667) 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, 25461 + ... + 25738.

It is an arithmetic number, because the mean of its divisors is an integer number (1792000).

Almost surely, 2^7116661 is an apocalyptic number.

It is an amenable number.

7116661 is a deficient number, since it is larger than the sum of its proper divisors (51339).

7116661 is a wasteful number, since it uses less digits than its factorization.

7116661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51338.

The product of its digits is 1512, while the sum is 28.

The square root of 7116661 is about 2667.7070678768. The cubic root of 7116661 is about 192.3499567291.

It can be divided in two parts, 7116 and 661, that added together give a palindrome (7777).

The spelling of 7116661 in words is "seven million, one hundred sixteen thousand, six hundred sixty-one".