7166681 has 4 divisors (see below), whose sum is σ = 7333392. Its totient is φ = 6999972.

The previous prime is 7166659. The next prime is 7166689. The reversal of 7166681 is 1866617.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7166681 is a prime.

It is a super-2 number, since 2×7166681² = 102722633111522, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (7166689) 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, 83291 + ... + 83376.

It is an arithmetic number, because the mean of its divisors is an integer number (1833348).

Almost surely, 2^7166681 is an apocalyptic number.

It is an amenable number.

7166681 is a deficient number, since it is larger than the sum of its proper divisors (166711).

7166681 is a wasteful number, since it uses less digits than its factorization.

7166681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166710.

The product of its digits is 12096, while the sum is 35.

The square root of 7166681 is about 2677.0657444299. The cubic root of 7166681 is about 192.7995538548.

The spelling of 7166681 in words is "seven million, one hundred sixty-six thousand, six hundred eighty-one".