67975989656 has 8 divisors (see below), whose sum is σ = 127454980620. Its totient is φ = 33987994824.

The previous prime is 67975989649. The next prime is 67975989751. The reversal of 67975989656 is 65698957976.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248499346 + ... + 4248499361.

Almost surely, 2^67975989656 is an apocalyptic number.

It is an amenable number.

67975989656 is a deficient number, since it is larger than the sum of its proper divisors (59478990964).

67975989656 is a wasteful number, since it uses less digits than its factorization.

67975989656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496998713 (or 8496998709 counting only the distinct ones).

The product of its digits is 1543147200, while the sum is 77.

The spelling of 67975989656 in words is "sixty-seven billion, nine hundred seventy-five million, nine hundred eighty-nine thousand, six hundred fifty-six".