67665720732 has 24 divisors (see below), whose sum is σ = 157891667472. Its totient is φ = 22554528000.

The previous prime is 67665720709. The next prime is 67665720739. The reversal of 67665720732 is 23702756676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67665720739) 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 7 ways as a sum of consecutive naturals, for example, 425982 + ... + 562842.

It is an arithmetic number, because the mean of its divisors is an integer number (6578819478).

Almost surely, 2^67665720732 is an apocalyptic number.

It is an amenable number.

67665720732 is an abundant number, since it is smaller than the sum of its proper divisors (90225946740).

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

67665720732 is a wasteful number, since it uses less digits than its factorization.

67665720732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178069 (or 178067 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 51.

The spelling of 67665720732 in words is "sixty-seven billion, six hundred sixty-five million, seven hundred twenty thousand, seven hundred thirty-two".