33668000172 has 18 divisors (see below), whose sum is σ = 85105222748. Its totient is φ = 11222666712.

The previous prime is 33668000159. The next prime is 33668000279. The reversal of 33668000172 is 27100086633.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×33668000172² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 935222227 = 33668000172 / (3 + 3 + 6 + 6 + 8 + 0 + 0 + 0 + 1 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467611078 + ... + 467611149.

Almost surely, 2^33668000172 is an apocalyptic number.

It is an amenable number.

33668000172 is an abundant number, since it is smaller than the sum of its proper divisors (51437222576).

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

33668000172 is a wasteful number, since it uses less digits than its factorization.

33668000172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935222237 (or 935222232 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 33668000172 in words is "thirty-three billion, six hundred sixty-eight million, one hundred seventy-two", and thus it is an aban number.