6556745 has 16 divisors (see below), whose sum is σ = 8542800. Its totient is φ = 4802304.

The previous prime is 6556741. The next prime is 6556757. The reversal of 6556745 is 5476556.

It can be written as a sum of positive squares in 8 ways, for example, as 110224 + 6446521 = 332^2 + 2539^2 .

It is not a de Polignac number, because 6556745 - 2² = 6556741 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6556699 and 6556708.

It is not an unprimeable number, because it can be changed into a prime (6556741) 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, 9347 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (533925).

Almost surely, 2^6556745 is an apocalyptic number.

6556745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6556745 is a deficient number, since it is larger than the sum of its proper divisors (1986055).

6556745 is a wasteful number, since it uses less digits than its factorization.

6556745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its digits is 126000, while the sum is 38.

The square root of 6556745 is about 2560.6141841363. The cubic root of 6556745 is about 187.1670654707.

The spelling of 6556745 in words is "six million, five hundred fifty-six thousand, seven hundred forty-five".