67997056 has 32 divisors (see below), whose sum is σ = 136316880. Its totient is φ = 33784320.

The previous prime is 67997053. The next prime is 67997057. The reversal of 67997056 is 65079976.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67997051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19786 + ... + 22966.

Almost surely, 2^67997056 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 67997056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68158440).

67997056 is an abundant number, since it is smaller than the sum of its proper divisors (68319824).

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

67997056 is a wasteful number, since it uses less digits than its factorization.

67997056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 3350 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 67997056 is about 8246.0327430832. The cubic root of 67997056 is about 408.1596197182.

The spelling of 67997056 in words is "sixty-seven million, nine hundred ninety-seven thousand, fifty-six".