6631620 has 24 divisors (see below), whose sum is σ = 18568704. Its totient is φ = 1768416.

The previous prime is 6631619. The next prime is 6631637. The reversal of 6631620 is 261366.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55204 + ... + 55323.

It is an arithmetic number, because the mean of its divisors is an integer number (773696).

Almost surely, 2^6631620 is an apocalyptic number.

6631620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6631620 is an abundant number, since it is smaller than the sum of its proper divisors (11937084).

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

6631620 is a wasteful number, since it uses less digits than its factorization.

6631620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110539 (or 110537 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 6631620 is about 2575.1931966359. The cubic root of 6631620 is about 187.8768243995.

Adding to 6631620 its reverse (261366), we get a palindrome (6892986).

The spelling of 6631620 in words is "six million, six hundred thirty-one thousand, six hundred twenty".