533516661 has 12 divisors (see below), whose sum is σ = 815966892. Its totient is φ = 334755456.

The previous prime is 533516657. The next prime is 533516663. The reversal of 533516661 is 166615335.

It can be written as a sum of positive squares in 2 ways, for example, as 478296900 + 55219761 = 21870^2 + 7431^2 .

It is not a de Polignac number, because 533516661 - 2² = 533516657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533516663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1743366 + ... + 1743671.

It is an arithmetic number, because the mean of its divisors is an integer number (67997241).

Almost surely, 2^533516661 is an apocalyptic number.

533516661 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

533516661 is a deficient number, since it is larger than the sum of its proper divisors (282450231).

533516661 is a wasteful number, since it uses less digits than its factorization.

533516661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487060 (or 3487057 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 533516661 is about 23097.9795869682. The cubic root of 533516661 is about 811.0531750901.

The spelling of 533516661 in words is "five hundred thirty-three million, five hundred sixteen thousand, six hundred sixty-one".