67668404 has 6 divisors (see below), whose sum is σ = 118419714. Its totient is φ = 33834200.

The previous prime is 67668401. The next prime is 67668407. The reversal of 67668404 is 40486676.

It is an interprime number because it is at equal distance from previous prime (67668401) and next prime (67668407).

It can be written as a sum of positive squares in only one way, i.e., 62378404 + 5290000 = 7898^2 + 2300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67668401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8458547 + ... + 8458554.

It is an arithmetic number, because the mean of its divisors is an integer number (19736619).

Almost surely, 2^67668404 is an apocalyptic number.

It is an amenable number.

67668404 is a deficient number, since it is larger than the sum of its proper divisors (50751310).

67668404 is a wasteful number, since it uses less digits than its factorization.

67668404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16917105 (or 16917103 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 67668404 is about 8226.0807192733. The cubic root of 67668404 is about 407.5009677922.

The spelling of 67668404 in words is "sixty-seven million, six hundred sixty-eight thousand, four hundred four".