7086661 has 2 divisors, whose sum is σ = 7086662. Its totient is φ = 7086660.

The previous prime is 7086659. The next prime is 7086679. The reversal of 7086661 is 1666807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7049025 + 37636 = 2655^2 + 194^2 .

It is an emirp because it is prime and its reverse (1666807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7086661 - 2¹ = 7086659 is a prime.

Together with 7086659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7086061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3543330 + 3543331.

It is an arithmetic number, because the mean of its divisors is an integer number (3543331).

Almost surely, 2^7086661 is an apocalyptic number.

It is an amenable number.

7086661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7086661 is an equidigital number, since it uses as much as digits as its factorization.

7086661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 7086661 is about 2662.0783234157. The cubic root of 7086661 is about 192.0792948658.

The spelling of 7086661 in words is "seven million, eighty-six thousand, six hundred sixty-one".