67656340 has 48 divisors (see below), whose sum is σ = 156078720. Its totient is φ = 24520320.

The previous prime is 67656331. The next prime is 67656383. The reversal of 67656340 is 4365676.

It is a self number, because there is not a number n which added to its sum of digits gives 67656340.

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, 4870 + ... + 12610.

It is an arithmetic number, because the mean of its divisors is an integer number (3251640).

Almost surely, 2^67656340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67656340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78039360).

67656340 is an abundant number, since it is smaller than the sum of its proper divisors (88422380).

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

67656340 is a wasteful number, since it uses less digits than its factorization.

67656340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7792 (or 7790 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 67656340 is about 8225.3474090764. The cubic root of 67656340 is about 407.4767497744.

The spelling of 67656340 in words is "sixty-seven million, six hundred fifty-six thousand, three hundred forty".