67808564 has 6 divisors (see below), whose sum is σ = 118664994. Its totient is φ = 33904280.

The previous prime is 67808557. The next prime is 67808567. The reversal of 67808564 is 46580876.

It can be written as a sum of positive squares in only one way, i.e., 55502500 + 12306064 = 7450^2 + 3508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67808567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8476067 + ... + 8476074.

It is an arithmetic number, because the mean of its divisors is an integer number (19777499).

Almost surely, 2^67808564 is an apocalyptic number.

It is an amenable number.

67808564 is a deficient number, since it is larger than the sum of its proper divisors (50856430).

67808564 is a wasteful number, since it uses less digits than its factorization.

67808564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16952145 (or 16952143 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 67808564 is about 8234.5955577672. The cubic root of 67808564 is about 407.7821228745.

The spelling of 67808564 in words is "sixty-seven million, eight hundred eight thousand, five hundred sixty-four".