7668961 has 4 divisors (see below), whose sum is σ = 7679124. Its totient is φ = 7658800.

The previous prime is 7668937. The next prime is 7668977. The reversal of 7668961 is 1698667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1698667 = 61 ⋅27847.

It can be written as a sum of positive squares in 2 ways, for example, as 2193361 + 5475600 = 1481^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 7668961 - 2⁷ = 7668833 is a prime.

It is a Duffinian number.

7668961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7668901) 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, 3850 + ... + 5491.

It is an arithmetic number, because the mean of its divisors is an integer number (1919781).

Almost surely, 2^7668961 is an apocalyptic number.

It is an amenable number.

7668961 is a deficient number, since it is larger than the sum of its proper divisors (10163).

7668961 is an equidigital number, since it uses as much as digits as its factorization.

7668961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10162.

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

The square root of 7668961 is about 2769.2888978942. The cubic root of 7668961 is about 197.2023910526.

The spelling of 7668961 in words is "seven million, six hundred sixty-eight thousand, nine hundred sixty-one".