67508681816 has 16 divisors (see below), whose sum is σ = 129999827040. Its totient is φ = 32842061280.

The previous prime is 67508681783. The next prime is 67508681887. The reversal of 67508681816 is 61818680576.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114034640 + ... + 114035231.

It is an arithmetic number, because the mean of its divisors is an integer number (8124989190).

Almost surely, 2^67508681816 is an apocalyptic number.

It is an amenable number.

67508681816 is a deficient number, since it is larger than the sum of its proper divisors (62491145224).

67508681816 is a wasteful number, since it uses less digits than its factorization.

67508681816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228069914 (or 228069910 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 56.

The spelling of 67508681816 in words is "sixty-seven billion, five hundred eight million, six hundred eighty-one thousand, eight hundred sixteen".