67668820 has 12 divisors (see below), whose sum is σ = 142104564. Its totient is φ = 27067520.

The previous prime is 67668791. The next prime is 67668859. The reversal of 67668820 is 2886676.

It can be written as a sum of positive squares in 2 ways, for example, as 7420176 + 60248644 = 2724^2 + 7762^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691701 + ... + 1691740.

It is an arithmetic number, because the mean of its divisors is an integer number (11842047).

Almost surely, 2^67668820 is an apocalyptic number.

It is an amenable number.

67668820 is an abundant number, since it is smaller than the sum of its proper divisors (74435744).

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

67668820 is a wasteful number, since it uses less digits than its factorization.

67668820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383450 (or 3383448 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 67668820 is about 8226.1060046659. The cubic root of 67668820 is about 407.5018028450.

It can be divided in two parts, 676 and 68820, that added together give a palindrome (69496).

The spelling of 67668820 in words is "sixty-seven million, six hundred sixty-eight thousand, eight hundred twenty".