6691033 has 4 divisors (see below), whose sum is σ = 6697728. Its totient is φ = 6684340.

The previous prime is 6691019. The next prime is 6691037. The reversal of 6691033 is 3301966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3301966 = 2 ⋅1650983.

It is a cyclic number.

It is not a de Polignac number, because 6691033 - 2¹⁷ = 6559961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6690992 and 6691010.

It is not an unprimeable number, because it can be changed into a prime (6691037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513 + ... + 3958.

It is an arithmetic number, because the mean of its divisors is an integer number (1674432).

Almost surely, 2^6691033 is an apocalyptic number.

It is an amenable number.

6691033 is a deficient number, since it is larger than the sum of its proper divisors (6695).

6691033 is a wasteful number, since it uses less digits than its factorization.

6691033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 6691033 is about 2586.7031140044. The cubic root of 6691033 is about 188.4362229625.

Adding to 6691033 its reverse (3301966), we get a palindrome (9992999).

The spelling of 6691033 in words is "six million, six hundred ninety-one thousand, thirty-three".