6657066 has 80 divisors (see below), whose sum is σ = 16770600. Its totient is φ = 1959552.

The previous prime is 6657061. The next prime is 6657067. The reversal of 6657066 is 6607566.

It can be written as a sum of positive squares in 4 ways, for example, as 5267025 + 1390041 = 2295^2 + 1179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6657066.

It is not an unprimeable number, because it can be changed into a prime (6657061) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 61020 + ... + 61128.

Almost surely, 2^6657066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6657066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8385300).

6657066 is an abundant number, since it is smaller than the sum of its proper divisors (10113534).

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

6657066 is a wasteful number, since it uses less digits than its factorization.

6657066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 6657066 is about 2580.1290665391. The cubic root of 6657066 is about 188.1168166402.

The spelling of 6657066 in words is "six million, six hundred fifty-seven thousand, sixty-six".