33021668 has 6 divisors (see below), whose sum is σ = 57787926. Its totient is φ = 16510832.

The previous prime is 33021661. The next prime is 33021671. The reversal of 33021668 is 86612033.

It can be written as a sum of positive squares in only one way, i.e., 32171584 + 850084 = 5672^2 + 922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 33021668.

It is not an unprimeable number, because it can be changed into a prime (33021661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4127705 + ... + 4127712.

It is an arithmetic number, because the mean of its divisors is an integer number (9631321).

Almost surely, 2^33021668 is an apocalyptic number.

It is an amenable number.

33021668 is a deficient number, since it is larger than the sum of its proper divisors (24766258).

33021668 is a wasteful number, since it uses less digits than its factorization.

33021668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8255421 (or 8255419 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 33021668 is about 5746.4482943815. The cubic root of 33021668 is about 320.8236205227.

The spelling of 33021668 in words is "thirty-three million, twenty-one thousand, six hundred sixty-eight".