67171621201 has 4 divisors (see below), whose sum is σ = 67421330100. Its totient is φ = 66921912304.

The previous prime is 67171621151. The next prime is 67171621207. The reversal of 67171621201 is 10212617176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28520454400 + 38651166801 = 168880^2 + 196599^2 .

It is a cyclic number.

It is not a de Polignac number, because 67171621201 - 2⁷ = 67171621073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67171621207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124854046 + ... + 124854583.

It is an arithmetic number, because the mean of its divisors is an integer number (16855332525).

Almost surely, 2^67171621201 is an apocalyptic number.

It is an amenable number.

67171621201 is a deficient number, since it is larger than the sum of its proper divisors (249708899).

67171621201 is a wasteful number, since it uses less digits than its factorization.

67171621201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249708898.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 67171621201 in words is "sixty-seven billion, one hundred seventy-one million, six hundred twenty-one thousand, two hundred one".