6816625 has 16 divisors (see below), whose sum is σ = 8880768. Its totient is φ = 5214000.

The previous prime is 6816617. The next prime is 6816629. The reversal of 6816625 is 5266186.

It is not a de Polignac number, because 6816625 - 2³ = 6816617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6816629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1690 + ... + 4060.

It is an arithmetic number, because the mean of its divisors is an integer number (555048).

Almost surely, 2^6816625 is an apocalyptic number.

It is an amenable number.

6816625 is a deficient number, since it is larger than the sum of its proper divisors (2064143).

6816625 is a wasteful number, since it uses less digits than its factorization.

6816625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409 (or 2399 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 6816625 is about 2610.8667143307. The cubic root of 6816625 is about 189.6079172188.

The spelling of 6816625 in words is "six million, eight hundred sixteen thousand, six hundred twenty-five".