6681025 has 24 divisors (see below), whose sum is σ = 9094904. Its totient is φ = 4838400.

The previous prime is 6681023. The next prime is 6681041. The reversal of 6681025 is 5201866.

It can be written as a sum of positive squares in 12 ways, for example, as 5574321 + 1106704 = 2361^2 + 1052^2 .

It is not a de Polignac number, because 6681025 - 2¹ = 6681023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6680984 and 6681002.

It is not an unprimeable number, because it can be changed into a prime (6681023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19657 + ... + 19993.

Almost surely, 2^6681025 is an apocalyptic number.

6681025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6681025 is a deficient number, since it is larger than the sum of its proper divisors (2413879).

6681025 is a wasteful number, since it uses less digits than its factorization.

6681025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 6681025 is about 2584.7678812613. The cubic root of 6681025 is about 188.3422259791.

The spelling of 6681025 in words is "six million, six hundred eighty-one thousand, twenty-five".