6637961 has 8 divisors (see below), whose sum is σ = 7556544. Its totient is φ = 5771920.

The previous prime is 6637957. The next prime is 6637979. The reversal of 6637961 is 1697366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6637961 - 2² = 6637957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6637921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12866 + ... + 13371.

It is an arithmetic number, because the mean of its divisors is an integer number (944568).

Almost surely, 2^6637961 is an apocalyptic number.

It is an amenable number.

6637961 is a deficient number, since it is larger than the sum of its proper divisors (918583).

6637961 is a wasteful number, since it uses less digits than its factorization.

6637961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26271.

The product of its digits is 40824, while the sum is 38.

The square root of 6637961 is about 2576.4240722366. The cubic root of 6637961 is about 187.9366864664.

The spelling of 6637961 in words is "six million, six hundred thirty-seven thousand, nine hundred sixty-one".