67012607440 has 160 divisors (see below), whose sum is σ = 161798956704. Its totient is φ = 25794478080.

The previous prime is 67012607437. The next prime is 67012607471. The reversal of 67012607440 is 4470621076.

It can be written as a sum of positive squares in 16 ways, for example, as 6667702336 + 60344905104 = 81656^2 + 245652^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67012607440.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 88523542 + ... + 88524298.

Almost surely, 2^67012607440 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 67012607440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80899478352).

67012607440 is an abundant number, since it is smaller than the sum of its proper divisors (94786349264).

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

67012607440 is a wasteful number, since it uses less digits than its factorization.

67012607440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 67012607440 in words is "sixty-seven billion, twelve million, six hundred seven thousand, four hundred forty".