6658820 has 24 divisors (see below), whose sum is σ = 15981504. Its totient is φ = 2282976.

The previous prime is 6658793. The next prime is 6658823. The reversal of 6658820 is 288566.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (6658823) 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, 23642 + ... + 23921.

It is an arithmetic number, because the mean of its divisors is an integer number (665896).

Almost surely, 2^6658820 is an apocalyptic number.

It is an amenable number.

6658820 is an abundant number, since it is smaller than the sum of its proper divisors (9322684).

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

6658820 is a wasteful number, since it uses less digits than its factorization.

6658820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47579 (or 47577 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 6658820 is about 2580.4689496291. The cubic root of 6658820 is about 188.1333368270.

The spelling of 6658820 in words is "six million, six hundred fifty-eight thousand, eight hundred twenty".