67917301668 has 36 divisors (see below), whose sum is σ = 174494275228. Its totient is φ = 22267967040.

The previous prime is 67917301649. The next prime is 67917301679. The reversal of 67917301668 is 86610371976.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16337441124 + 51579860544 = 127818^2 + 227112^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×67917301668² (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 11 ways as a sum of consecutive naturals, for example, 15461671 + ... + 15466062.

Almost surely, 2^67917301668 is an apocalyptic number.

It is an amenable number.

67917301668 is an abundant number, since it is smaller than the sum of its proper divisors (106576973560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67917301668 is a wasteful number, since it uses less digits than its factorization.

67917301668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30927804 (or 30927799 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 67917301668 in words is "sixty-seven billion, nine hundred seventeen million, three hundred one thousand, six hundred sixty-eight".