7966861 has 8 divisors (see below), whose sum is σ = 9291200. Its totient is φ = 6828444.

The previous prime is 7966853. The next prime is 7966867. The reversal of 7966861 is 1686697.

It is not a de Polignac number, because 7966861 - 2³ = 7966853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7966867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11271 + ... + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (1161400).

Almost surely, 2^7966861 is an apocalyptic number.

It is an amenable number.

7966861 is a deficient number, since it is larger than the sum of its proper divisors (1324339).

7966861 is an equidigital number, since it uses as much as digits as its factorization.

7966861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23248 (or 23234 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 7966861 is about 2822.5628425245. The cubic root of 7966861 is about 199.7234594696.

The spelling of 7966861 in words is "seven million, nine hundred sixty-six thousand, eight hundred sixty-one".