67121968 has 20 divisors (see below), whose sum is σ = 133074568. Its totient is φ = 32780160.

The previous prime is 67121953. The next prime is 67121983. The reversal of 67121968 is 86912176.

It is an interprime number because it is at equal distance from previous prime (67121953) and next prime (67121983).

It is a self number, because there is not a number n which added to its sum of digits gives 67121968.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48093 + ... + 49468.

Almost surely, 2^67121968 is an apocalyptic number.

It is an amenable number.

67121968 is a deficient number, since it is larger than the sum of its proper divisors (65952600).

67121968 is a wasteful number, since it uses less digits than its factorization.

67121968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97612 (or 97606 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 67121968 is about 8192.7997656479. The cubic root of 67121968 is about 406.4011178075.

The spelling of 67121968 in words is "sixty-seven million, one hundred twenty-one thousand, nine hundred sixty-eight".