666673667101 has 8 divisors (see below), whose sum is σ = 718081482104. Its totient is φ = 615283741440.

The previous prime is 666673667087. The next prime is 666673667159. The reversal of 666673667101 is 101766376666.

It can be written as a sum of positive squares in 4 ways, for example, as 114734625625 + 551939041476 = 338725^2 + 742926^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 666673667101 - 2⁵ = 666673667069 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 (666673667201) 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, 4394880 + ... + 4544041.

It is an arithmetic number, because the mean of its divisors is an integer number (89760185263).

Almost surely, 2^666673667101 is an apocalyptic number.

It is an amenable number.

666673667101 is a deficient number, since it is larger than the sum of its proper divisors (51407815003).

666673667101 is a wasteful number, since it uses less digits than its factorization.

666673667101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8944671.

The product of its (nonzero) digits is 6858432, while the sum is 55.

The spelling of 666673667101 in words is "six hundred sixty-six billion, six hundred seventy-three million, six hundred sixty-seven thousand, one hundred one".