67002171670661 has 4 divisors (see below), whose sum is σ = 67004368709772. Its totient is φ = 66999974631552.

The previous prime is 67002171670571. The next prime is 67002171670711. The reversal of 67002171670661 is 16607617120076.

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 61314929248225 + 5687242422436 = 7830385^2 + 2384794^2 .

It is a cyclic number.

It is not a de Polignac number, because 67002171670661 - 2¹⁴ = 67002171654277 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 (67002171670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098473810 + ... + 1098534803.

It is an arithmetic number, because the mean of its divisors is an integer number (16751092177443).

Almost surely, 2^{67002171670661} is an apocalyptic number.

It is an amenable number.

67002171670661 is a deficient number, since it is larger than the sum of its proper divisors (2197039111).

67002171670661 is a wasteful number, since it uses less digits than its factorization.

67002171670661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197039110.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 67002171670661 in words is "sixty-seven trillion, two billion, one hundred seventy-one million, six hundred seventy thousand, six hundred sixty-one".