67142007440 has 40 divisors (see below), whose sum is σ = 156127358400. Its totient is φ = 26852985216.

The previous prime is 67142007407. The next prime is 67142007461. The reversal of 67142007440 is 4470024176.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 67142007440.

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, 544661 + ... + 656459.

It is an arithmetic number, because the mean of its divisors is an integer number (3903183960).

Almost surely, 2^67142007440 is an apocalyptic number.

It is an amenable number.

67142007440 is an abundant number, since it is smaller than the sum of its proper divisors (88985350960).

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

67142007440 is a wasteful number, since it uses less digits than its factorization.

67142007440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119319 (or 119313 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The spelling of 67142007440 in words is "sixty-seven billion, one hundred forty-two million, seven thousand, four hundred forty".