33791661 has 10 divisors (see below), whose sum is σ = 50479022. Its totient is φ = 22527720.

The previous prime is 33791647. The next prime is 33791663. The reversal of 33791661 is 16619733.

33791661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33698025 + 93636 = 5805^2 + 306^2 .

It is not a de Polignac number, because 33791661 - 2⁵ = 33791629 is a prime.

It is a super-2 number, since 2×33791661² = 2283752706277842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33791663) 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 9 ways as a sum of consecutive naturals, for example, 208510 + ... + 208671.

Almost surely, 2^33791661 is an apocalyptic number.

It is an amenable number.

33791661 is a deficient number, since it is larger than the sum of its proper divisors (16687361).

33791661 is an equidigital number, since it uses as much as digits as its factorization.

33791661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417193 (or 417184 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 33791661 is about 5813.0595214568. The cubic root of 33791661 is about 323.2981205379.

The spelling of 33791661 in words is "thirty-three million, seven hundred ninety-one thousand, six hundred sixty-one".