33668978 has 12 divisors (see below), whose sum is σ = 58749102. Its totient is φ = 14429520.

The previous prime is 33668977. The next prime is 33669023. The reversal of 33668978 is 87986633.

33668978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 8196769 = 5047^2 + 2863^2 .

It is a super-2 number, since 2×33668978² = 2267200159128968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33668977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171683 + ... + 171878.

Almost surely, 2^33668978 is an apocalyptic number.

33668978 is a deficient number, since it is larger than the sum of its proper divisors (25080124).

33668978 is a wasteful number, since it uses less digits than its factorization.

33668978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343577 (or 343570 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 33668978 is about 5802.4975657039. The cubic root of 33668978 is about 322.9063939088.

The spelling of 33668978 in words is "thirty-three million, six hundred sixty-eight thousand, nine hundred seventy-eight".