6619920 has 40 divisors (see below), whose sum is σ = 20522496. Its totient is φ = 1765248.

The previous prime is 6619889. The next prime is 6619927. The reversal of 6619920 is 299166.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (6619927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13552 + ... + 14031.

Almost surely, 2^6619920 is an apocalyptic number.

6619920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6619920 is an abundant number, since it is smaller than the sum of its proper divisors (13902576).

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

6619920 is a wasteful number, since it uses less digits than its factorization.

6619920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27599 (or 27593 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 6619920 is about 2572.9205195653. The cubic root of 6619920 is about 187.7662705765.

The spelling of 6619920 in words is "six million, six hundred nineteen thousand, nine hundred twenty".