33666872 has 32 divisors (see below), whose sum is σ = 64774080. Its totient is φ = 16398720.

The previous prime is 33666859. The next prime is 33666901. The reversal of 33666872 is 27866633.

It is a super-2 number, since 2×33666872² = 2266916540528768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 114758 + ... + 115050.

It is an arithmetic number, because the mean of its divisors is an integer number (2024190).

Almost surely, 2^33666872 is an apocalyptic number.

It is an amenable number.

33666872 is a deficient number, since it is larger than the sum of its proper divisors (31107208).

33666872 is a wasteful number, since it uses less digits than its factorization.

33666872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 619 counting only the distinct ones).

The product of its digits is 217728, while the sum is 41.

The square root of 33666872 is about 5802.3160892871. The cubic root of 33666872 is about 322.8996611528.

The spelling of 33666872 in words is "thirty-three million, six hundred sixty-six thousand, eight hundred seventy-two".