67121418997 has 8 divisors (see below), whose sum is σ = 70903792160. Its totient is φ = 63364012560.

The previous prime is 67121418943. The next prime is 67121419007. The reversal of 67121418997 is 79981412176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67121418997 - 2¹¹ = 67121416949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67121418907) 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, 6236154 + ... + 6246907.

It is an arithmetic number, because the mean of its divisors is an integer number (8862974020).

Almost surely, 2^67121418997 is an apocalyptic number.

It is an amenable number.

67121418997 is a deficient number, since it is larger than the sum of its proper divisors (3782373163).

67121418997 is a wasteful number, since it uses less digits than its factorization.

67121418997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12483363.

The product of its digits is 1524096, while the sum is 55.

The spelling of 67121418997 in words is "sixty-seven billion, one hundred twenty-one million, four hundred eighteen thousand, nine hundred ninety-seven".