67318149681 has 8 divisors (see below), whose sum is σ = 99730592160. Its totient is φ = 44878766436.

The previous prime is 67318149673. The next prime is 67318149697. The reversal of 67318149681 is 18694181376.

67318149681 is a `hidden beast` number, since 6 + 73 + 1 + 8 + 1 + 496 + 81 = 666.

It is not a de Polignac number, because 67318149681 - 2³ = 67318149673 is a prime.

It is a super-2 number, since 2×67318149681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67318149631) 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, 1246632375 + ... + 1246632428.

It is an arithmetic number, because the mean of its divisors is an integer number (12466324020).

Almost surely, 2^67318149681 is an apocalyptic number.

It is an amenable number.

67318149681 is a deficient number, since it is larger than the sum of its proper divisors (32412442479).

67318149681 is a wasteful number, since it uses less digits than its factorization.

67318149681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493264812 (or 2493264806 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 67318149681 in words is "sixty-seven billion, three hundred eighteen million, one hundred forty-nine thousand, six hundred eighty-one".