67055721241840 has 80 divisors (see below), whose sum is σ = 160153952794560. Its totient is φ = 26091532615680.

The previous prime is 67055721241799. The next prime is 67055721241937. The reversal of 67055721241840 is 4814212755076.

It is a tau number, because it is divible by the number of its divisors (80).

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, 10735981 + ... + 15791539.

It is an arithmetic number, because the mean of its divisors is an integer number (2001924409932).

Almost surely, 2^{67055721241840} 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 67055721241840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80076976397280).

67055721241840 is an abundant number, since it is smaller than the sum of its proper divisors (93098231552720).

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

67055721241840 is a wasteful number, since it uses less digits than its factorization.

67055721241840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060090 (or 5060084 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 52.

The spelling of 67055721241840 in words is "sixty-seven trillion, fifty-five billion, seven hundred twenty-one million, two hundred forty-one thousand, eight hundred forty".