7966691 has 2 divisors, whose sum is σ = 7966692. Its totient is φ = 7966690.

The previous prime is 7966663. The next prime is 7966703. The reversal of 7966691 is 1966697.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1966697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7966691 - 2⁶ = 7966627 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (7966391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3983345 + 3983346.

It is an arithmetic number, because the mean of its divisors is an integer number (3983346).

Almost surely, 2^7966691 is an apocalyptic number.

7966691 is a deficient number, since it is larger than the sum of its proper divisors (1).

7966691 is an equidigital number, since it uses as much as digits as its factorization.

7966691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 7966691 is about 2822.5327278882. The cubic root of 7966691 is about 199.7220388670.

The spelling of 7966691 in words is "seven million, nine hundred sixty-six thousand, six hundred ninety-one".