67520830081 has 16 divisors (see below), whose sum is σ = 71279208000. Its totient is φ = 63783203328.

The previous prime is 67520830057. The next prime is 67520830087. The reversal of 67520830081 is 18003802576.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67520830081 is a prime.

It is a super-2 number, since 2×67520830081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67520830087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10466745 + ... + 10473193.

It is an arithmetic number, because the mean of its divisors is an integer number (4454950500).

Almost surely, 2^67520830081 is an apocalyptic number.

It is an amenable number.

67520830081 is a deficient number, since it is larger than the sum of its proper divisors (3758377919).

67520830081 is a wasteful number, since it uses less digits than its factorization.

67520830081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 67520830081 in words is "sixty-seven billion, five hundred twenty million, eight hundred thirty thousand, eighty-one".