6554665 has 12 divisors (see below), whose sum is σ = 8518284. Its totient is φ = 4839744.

The previous prime is 6554663. The next prime is 6554683. The reversal of 6554665 is 5664556.

6554665 = 285² + 286² + ... + 349².

It can be written as a sum of positive squares in 6 ways, for example, as 522729 + 6031936 = 723^2 + 2456^2 .

It is not a de Polignac number, because 6554665 - 2¹ = 6554663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6554663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3034 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (709857).

Almost surely, 2^6554665 is an apocalyptic number.

6554665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6554665 is a deficient number, since it is larger than the sum of its proper divisors (1963619).

6554665 is a wasteful number, since it uses less digits than its factorization.

6554665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7788 (or 7775 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 6554665 is about 2560.2079993626. The cubic root of 6554665 is about 187.1472716721.

It can be divided in two parts, 65 and 54665, that multiplied together give a square (3553225 = 1885²).

The spelling of 6554665 in words is "six million, five hundred fifty-four thousand, six hundred sixty-five".