6620964 has 72 divisors (see below), whose sum is σ = 18580800. Its totient is φ = 1797312.

The previous prime is 6620953. The next prime is 6620981. The reversal of 6620964 is 4690266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44362 + ... + 44510.

Almost surely, 2^6620964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6620964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9290400).

6620964 is an abundant number, since it is smaller than the sum of its proper divisors (11959836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6620964 is a wasteful number, since it uses less digits than its factorization.

6620964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6620964 is about 2573.1233938542. The cubic root of 6620964 is about 187.7761406697.

The spelling of 6620964 in words is "six million, six hundred twenty thousand, nine hundred sixty-four".