535666646 has 4 divisors (see below), whose sum is σ = 803499972. Its totient is φ = 267833322.

The previous prime is 535666643. The next prime is 535666673. The reversal of 535666646 is 646666535.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646666535 = 5 ⋅129333307.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 535666646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535666643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133916660 + ... + 133916663.

It is an arithmetic number, because the mean of its divisors is an integer number (200874993).

Almost surely, 2^535666646 is an apocalyptic number.

535666646 is a deficient number, since it is larger than the sum of its proper divisors (267833326).

535666646 is a wasteful number, since it uses less digits than its factorization.

535666646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267833325.

The product of its digits is 2332800, while the sum is 47.

The square root of 535666646 is about 23144.4733359824. The cubic root of 535666646 is about 812.1411855013.

The spelling of 535666646 in words is "five hundred thirty-five million, six hundred sixty-six thousand, six hundred forty-six".