67721588005 has 8 divisors (see below), whose sum is σ = 83887386624. Its totient is φ = 52429616400.

The previous prime is 67721588003. The next prime is 67721588041. The reversal of 67721588005 is 50088512776.

67721588005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67721588005 - 2¹ = 67721588003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67721588005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67721588003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218456581 + ... + 218456890.

It is an arithmetic number, because the mean of its divisors is an integer number (10485923328).

Almost surely, 2^67721588005 is an apocalyptic number.

It is an amenable number.

67721588005 is a deficient number, since it is larger than the sum of its proper divisors (16165798619).

67721588005 is a wasteful number, since it uses less digits than its factorization.

67721588005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436913507.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 67721588005 in words is "sixty-seven billion, seven hundred twenty-one million, five hundred eighty-eight thousand, five".