67320645392 has 320 divisors, whose sum is σ = 179508510720. Its totient is φ = 23612774400.

The previous prime is 67320645377. The next prime is 67320645407. The reversal of 67320645392 is 29354602376.

It is an interprime number because it is at equal distance from previous prime (67320645377) and next prime (67320645407).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180484118 + ... + 180484490.

It is an arithmetic number, because the mean of its divisors is an integer number (560964096).

Almost surely, 2^67320645392 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 67320645392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89754255360).

67320645392 is an abundant number, since it is smaller than the sum of its proper divisors (112187865328).

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

67320645392 is a wasteful number, since it uses less digits than its factorization.

67320645392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 47.

The spelling of 67320645392 in words is "sixty-seven billion, three hundred twenty million, six hundred forty-five thousand, three hundred ninety-two".