67688836440 has 64 divisors (see below), whose sum is σ = 204411375360. Its totient is φ = 17930812800.

The previous prime is 67688836379. The next prime is 67688836451. The reversal of 67688836440 is 4463888676.

67688836440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849674 + ... + 1885913.

It is an arithmetic number, because the mean of its divisors is an integer number (3193927740).

Almost surely, 2^67688836440 is an apocalyptic number.

67688836440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67688836440 is an abundant number, since it is smaller than the sum of its proper divisors (136722538920).

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

67688836440 is a wasteful number, since it uses less digits than its factorization.

67688836440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735752 (or 3735748 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 60.

The spelling of 67688836440 in words is "sixty-seven billion, six hundred eighty-eight million, eight hundred thirty-six thousand, four hundred forty".