6691560 has 32 divisors (see below), whose sum is σ = 20075040. Its totient is φ = 1784384.

The previous prime is 6691541. The next prime is 6691577. The reversal of 6691560 is 651966.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27762 + ... + 28001.

It is an arithmetic number, because the mean of its divisors is an integer number (627345).

Almost surely, 2^6691560 is an apocalyptic number.

6691560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6691560 is an abundant number, since it is smaller than the sum of its proper divisors (13383480).

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

6691560 is a wasteful number, since it uses less digits than its factorization.

6691560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55777 (or 55773 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6691560 is about 2586.8049791200. The cubic root of 6691560 is about 188.4411700453.

The spelling of 6691560 in words is "six million, six hundred ninety-one thousand, five hundred sixty".