67440781340 has 24 divisors (see below), whose sum is σ = 145453362432. Its totient is φ = 26247222720.

The previous prime is 67440781337. The next prime is 67440781367. The reversal of 67440781340 is 4318704476.

67440781340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 67440781291 and 67440781300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45567356 + ... + 45568835.

It is an arithmetic number, because the mean of its divisors is an integer number (6060556768).

Almost surely, 2^67440781340 is an apocalyptic number.

It is an amenable number.

67440781340 is an abundant number, since it is smaller than the sum of its proper divisors (78012581092).

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

67440781340 is a wasteful number, since it uses less digits than its factorization.

67440781340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91136237 (or 91136235 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 67440781340 in words is "sixty-seven billion, four hundred forty million, seven hundred eighty-one thousand, three hundred forty".