6668961 has 16 divisors (see below), whose sum is σ = 9624384. Its totient is φ = 4083264.

The previous prime is 6668957. The next prime is 6668969. The reversal of 6668961 is 1698666.

It is not a de Polignac number, because 6668961 - 2² = 6668957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11695 + ... + 12251.

It is an arithmetic number, because the mean of its divisors is an integer number (601524).

Almost surely, 2^6668961 is an apocalyptic number.

It is an amenable number.

6668961 is a deficient number, since it is larger than the sum of its proper divisors (2955423).

6668961 is a wasteful number, since it uses less digits than its factorization.

6668961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 93312, while the sum is 42.

The square root of 6668961 is about 2582.4331549916. The cubic root of 6668961 is about 188.2287938032.

The spelling of 6668961 in words is "six million, six hundred sixty-eight thousand, nine hundred sixty-one".