6573666 has 32 divisors (see below), whose sum is σ = 14496768. Its totient is φ = 1970640.

The previous prime is 6573661. The next prime is 6573667. The reversal of 6573666 is 6663756.

It is not an unprimeable number, because it can be changed into a prime (6573661) 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, 6315 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (453024).

Almost surely, 2^6573666 is an apocalyptic number.

6573666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6573666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7248384).

6573666 is an abundant number, since it is smaller than the sum of its proper divisors (7923102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6573666 is a wasteful number, since it uses less digits than its factorization.

6573666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 136080, while the sum is 39.

The square root of 6573666 is about 2563.9161452746. The cubic root of 6573666 is about 187.3279345914.

It can be divided in two parts, 657366 and 6, that multiplied together give a square (3944196 = 1986²).

The spelling of 6573666 in words is "six million, five hundred seventy-three thousand, six hundred sixty-six".