6699540 has 24 divisors (see below), whose sum is σ = 18758880. Its totient is φ = 1786528.

The previous prime is 6699491. The next prime is 6699541. The reversal of 6699540 is 459966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699541) 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, 55770 + ... + 55889.

It is an arithmetic number, because the mean of its divisors is an integer number (781620).

Almost surely, 2^6699540 is an apocalyptic number.

6699540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6699540 is an abundant number, since it is smaller than the sum of its proper divisors (12059340).

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

6699540 is a wasteful number, since it uses less digits than its factorization.

6699540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111671 (or 111669 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 6699540 is about 2588.3469628317. The cubic root of 6699540 is about 188.5160486070.

The spelling of 6699540 in words is "six million, six hundred ninety-nine thousand, five hundred forty".