7966657 has 4 divisors (see below), whose sum is σ = 8056260. Its totient is φ = 7877056.

The previous prime is 7966633. The next prime is 7966663. The reversal of 7966657 is 7566697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7566697 = 31 ⋅244087.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 5779216 = 1479^2 + 2404^2 .

It is a cyclic number.

It is not a de Polignac number, because 7966657 - 2¹¹ = 7964609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7966627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44668 + ... + 44845.

It is an arithmetic number, because the mean of its divisors is an integer number (2014065).

Almost surely, 2^7966657 is an apocalyptic number.

It is an amenable number.

7966657 is a deficient number, since it is larger than the sum of its proper divisors (89603).

7966657 is an equidigital number, since it uses as much as digits as its factorization.

7966657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89602.

The product of its digits is 476280, while the sum is 46.

The square root of 7966657 is about 2822.5267049224. The cubic root of 7966657 is about 199.7217547441.

The spelling of 7966657 in words is "seven million, nine hundred sixty-six thousand, six hundred fifty-seven".