6535666 has 16 divisors (see below), whose sum is σ = 10090080. Its totient is φ = 3173760.

The previous prime is 6535663. The next prime is 6535673. The reversal of 6535666 is 6665356.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6535663) 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, 11161 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (630630).

Almost surely, 2^6535666 is an apocalyptic number.

6535666 is a deficient number, since it is larger than the sum of its proper divisors (3554414).

6535666 is a wasteful number, since it uses less digits than its factorization.

6535666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its digits is 97200, while the sum is 37.

The square root of 6535666 is about 2556.4948660226. The cubic root of 6535666 is about 186.9662783427.

The spelling of 6535666 in words is "six million, five hundred thirty-five thousand, six hundred sixty-six".