533818661 has 24 divisors (see below), whose sum is σ = 592727520. Its totient is φ = 479372256.

The previous prime is 533818657. The next prime is 533818679. The reversal of 533818661 is 166818335.

It is not a de Polignac number, because 533818661 - 2² = 533818657 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533818651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1738670 + ... + 1738976.

It is an arithmetic number, because the mean of its divisors is an integer number (24696980).

Almost surely, 2^533818661 is an apocalyptic number.

It is an amenable number.

533818661 is a deficient number, since it is larger than the sum of its proper divisors (58908859).

533818661 is a wasteful number, since it uses less digits than its factorization.

533818661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 522 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 533818661 is about 23104.5160304214. The cubic root of 533818661 is about 811.2061799071.

The spelling of 533818661 in words is "five hundred thirty-three million, eight hundred eighteen thousand, six hundred sixty-one".