67399978432 has 28 divisors (see below), whose sum is σ = 134143750000. Its totient is φ = 33599978496.

The previous prime is 67399978417. The next prime is 67399978447. The reversal of 67399978432 is 23487999376.

It is an interprime number because it is at equal distance from previous prime (67399978417) and next prime (67399978447).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1540932 + ... + 1584067.

Almost surely, 2^67399978432 is an apocalyptic number.

It is an amenable number.

67399978432 is a deficient number, since it is larger than the sum of its proper divisors (66743771568).

67399978432 is a wasteful number, since it uses less digits than its factorization.

67399978432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125348 (or 3125338 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 67.

The spelling of 67399978432 in words is "sixty-seven billion, three hundred ninety-nine million, nine hundred seventy-eight thousand, four hundred thirty-two".