33686680 has 16 divisors (see below), whose sum is σ = 75795120. Its totient is φ = 13474656.

The previous prime is 33686671. The next prime is 33686683. The reversal of 33686680 is 8668633.

It is a super-2 number, since 2×33686680² = 2269584818844800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 842167 = 33686680 / (3 + 3 + 6 + 8 + 6 + 6 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33686683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421044 + ... + 421123.

It is an arithmetic number, because the mean of its divisors is an integer number (4737195).

Almost surely, 2^33686680 is an apocalyptic number.

It is an amenable number.

33686680 is an abundant number, since it is smaller than the sum of its proper divisors (42108440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33686680 is a wasteful number, since it uses less digits than its factorization.

33686680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842178 (or 842174 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 33686680 is about 5804.0227428913. The cubic root of 33686680 is about 322.9629750491.

The spelling of 33686680 in words is "thirty-three million, six hundred eighty-six thousand, six hundred eighty".