67161679217 has 8 divisors (see below), whose sum is σ = 71172176040. Its totient is φ = 63264154240.

The previous prime is 67161679213. The next prime is 67161679223. The reversal of 67161679217 is 71297616176.

It can be written as a sum of positive squares in 4 ways, for example, as 1883473201 + 65278206016 = 43399^2 + 255496^2 .

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

It is not a de Polignac number, because 67161679217 - 2² = 67161679213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67161679213) 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, 28241738 + ... + 28244115.

It is an arithmetic number, because the mean of its divisors is an integer number (8896522005).

Almost surely, 2^67161679217 is an apocalyptic number.

It is an amenable number.

67161679217 is a deficient number, since it is larger than the sum of its proper divisors (4010496823).

67161679217 is a wasteful number, since it uses less digits than its factorization.

67161679217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56485923.

The product of its digits is 1333584, while the sum is 53.

The spelling of 67161679217 in words is "sixty-seven billion, one hundred sixty-one million, six hundred seventy-nine thousand, two hundred seventeen".