6561626 has 16 divisors (see below), whose sum is σ = 10601280. Its totient is φ = 3034560.

The previous prime is 6561619. The next prime is 6561629. The reversal of 6561626 is 6261656.

It is a junction number, because it is equal to n+sod(n) for n = 6561592 and 6561601.

It is not an unprimeable number, because it can be changed into a prime (6561629) 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, 371 + ... + 3641.

It is an arithmetic number, because the mean of its divisors is an integer number (662580).

Almost surely, 2^6561626 is an apocalyptic number.

6561626 is a deficient number, since it is larger than the sum of its proper divisors (4039654).

6561626 is a wasteful number, since it uses less digits than its factorization.

6561626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349.

The product of its digits is 12960, while the sum is 32.

The square root of 6561626 is about 2561.5670984770. The cubic root of 6561626 is about 187.2134978518.

The spelling of 6561626 in words is "six million, five hundred sixty-one thousand, six hundred twenty-six".