666016436 has 24 divisors (see below), whose sum is σ = 1211478240. Its totient is φ = 319989600.

The previous prime is 666016433. The next prime is 666016457. The reversal of 666016436 is 634610666.

It is a self number, because there is not a number n which added to its sum of digits gives 666016436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666016433) 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, 10871 + ... + 38081.

It is an arithmetic number, because the mean of its divisors is an integer number (50478260).

Almost surely, 2^666016436 is an apocalyptic number.

It is an amenable number.

666016436 is a deficient number, since it is larger than the sum of its proper divisors (545461804).

666016436 is a wasteful number, since it uses less digits than its factorization.

666016436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27455 (or 27453 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 666016436 is about 25807.2942401950. The cubic root of 666016436 is about 873.2963579448.

It can be divided in two parts, 66601 and 6436, that added together give a palindrome (73037).

The spelling of 666016436 in words is "six hundred sixty-six million, sixteen thousand, four hundred thirty-six".