33666961 has 4 divisors (see below), whose sum is σ = 34753024. Its totient is φ = 32580900.

The previous prime is 33666947. The next prime is 33666973. The reversal of 33666961 is 16966633.

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.

It is a cyclic number.

It is not a de Polignac number, because 33666961 - 2¹³ = 33658769 is a prime.

It is a super-2 number, since 2×33666961² = 2266928525951042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33666901) 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, 542985 + ... + 543046.

It is an arithmetic number, because the mean of its divisors is an integer number (8688256).

Almost surely, 2^33666961 is an apocalyptic number.

33666961 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33666961 is a deficient number, since it is larger than the sum of its proper divisors (1086063).

33666961 is a wasteful number, since it uses less digits than its factorization.

33666961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086062.

The product of its digits is 104976, while the sum is 40.

The square root of 33666961 is about 5802.3237586333. The cubic root of 33666961 is about 322.8999456862.

The spelling of 33666961 in words is "thirty-three million, six hundred sixty-six thousand, nine hundred sixty-one".