67502746640 has 80 divisors (see below), whose sum is σ = 180465080448. Its totient is φ = 23001781248.

The previous prime is 67502746601. The next prime is 67502746643. The reversal of 67502746640 is 4664720576.

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

It is not an unprimeable number, because it can be changed into a prime (67502746643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 278477 + ... + 461036.

Almost surely, 2^67502746640 is an apocalyptic number.

It is an amenable number.

67502746640 is an abundant number, since it is smaller than the sum of its proper divisors (112962333808).

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

67502746640 is a wasteful number, since it uses less digits than its factorization.

67502746640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739696 (or 739690 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 67502746640 in words is "sixty-seven billion, five hundred two million, seven hundred forty-six thousand, six hundred forty".