67989712906 has 8 divisors (see below), whose sum is σ = 102920207940. Its totient is φ = 33682976928.

The previous prime is 67989712837. The next prime is 67989712927. The reversal of 67989712906 is 60921798976.

It can be written as a sum of positive squares in 2 ways, for example, as 65480203881 + 2509509025 = 255891^2 + 50095^2 .

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

It is a super-2 number, since 2×67989712906² (a number of 22 digits) contains 22 as substring.

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, 155939491 + ... + 155939926.

Almost surely, 2^67989712906 is an apocalyptic number.

67989712906 is a deficient number, since it is larger than the sum of its proper divisors (34930495034).

67989712906 is a wasteful number, since it uses less digits than its factorization.

67989712906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311879528.

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 67989712906 in words is "sixty-seven billion, nine hundred eighty-nine million, seven hundred twelve thousand, nine hundred six".