6669533 has 4 divisors (see below), whose sum is σ = 7182588. Its totient is φ = 6156480.

The previous prime is 6669521. The next prime is 6669541. The reversal of 6669533 is 3359666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3359666 = 2 ⋅1679833.

It can be written as a sum of positive squares in 2 ways, for example, as 1085764 + 5583769 = 1042^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 6669533 - 2⁶ = 6669469 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256508 + ... + 256533.

It is an arithmetic number, because the mean of its divisors is an integer number (1795647).

Almost surely, 2^6669533 is an apocalyptic number.

It is an amenable number.

6669533 is a deficient number, since it is larger than the sum of its proper divisors (513055).

6669533 is a wasteful number, since it uses less digits than its factorization.

6669533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513054.

The product of its digits is 87480, while the sum is 38.

The square root of 6669533 is about 2582.5439008853. The cubic root of 6669533 is about 188.2341751408.

The spelling of 6669533 in words is "six million, six hundred sixty-nine thousand, five hundred thirty-three".