68720581606 has 8 divisors (see below), whose sum is σ = 103081984704. Its totient is φ = 34359920040.

The previous prime is 68720581597. The next prime is 68720581607. The reversal of 68720581606 is 60618502786.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68720581606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68720581607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271851 + ... + 459721.

It is an arithmetic number, because the mean of its divisors is an integer number (12885248088).

Almost surely, 2^68720581606 is an apocalyptic number.

68720581606 is a deficient number, since it is larger than the sum of its proper divisors (34361403098).

68720581606 is a wasteful number, since it uses less digits than its factorization.

68720581606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370766.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 68720581606 in words is "sixty-eight billion, seven hundred twenty million, five hundred eighty-one thousand, six hundred six".