52665666 has 16 divisors (see below), whose sum is σ = 106665600. Its totient is φ = 17332848.

The previous prime is 52665637. The next prime is 52665667. The reversal of 52665666 is 66656625.

It is not an unprimeable number, because it can be changed into a prime (52665667) 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, 55081 + ... + 56028.

It is an arithmetic number, because the mean of its divisors is an integer number (6666600).

Almost surely, 2^52665666 is an apocalyptic number.

52665666 is an abundant number, since it is smaller than the sum of its proper divisors (53999934).

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

52665666 is a wasteful number, since it uses less digits than its factorization.

52665666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111193.

The product of its digits is 388800, while the sum is 42.

The square root of 52665666 is about 7257.1114088182. Note that the first 3 decimals coincide. The cubic root of 52665666 is about 374.8370634369.

The spelling of 52665666 in words is "fifty-two million, six hundred sixty-five thousand, six hundred sixty-six".