67040343440 has 80 divisors (see below), whose sum is σ = 179538604032. Its totient is φ = 22804250112.

The previous prime is 67040343373. The next prime is 67040343509. The reversal of 67040343440 is 4434304076.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 67040343440.

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, 400199 + ... + 542438.

Almost surely, 2^67040343440 is an apocalyptic number.

It is an amenable number.

67040343440 is an abundant number, since it is smaller than the sum of its proper divisors (112498260592).

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

67040343440 is a wasteful number, since it uses less digits than its factorization.

67040343440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942784 (or 942778 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 35.

The spelling of 67040343440 in words is "sixty-seven billion, forty million, three hundred forty-three thousand, four hundred forty".