671369220881 has 8 divisors (see below), whose sum is σ = 694533159720. Its totient is φ = 648206167168.

The previous prime is 671369220859. The next prime is 671369220889. The reversal of 671369220881 is 188022963176.

It can be written as a sum of positive squares in 4 ways, for example, as 17185899025 + 654183321856 = 131095^2 + 808816^2 .

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 671369220881 - 2¹⁸ = 671368958737 is a prime.

It is a super-2 number, since 2×671369220881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671369220889) 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 7 ways as a sum of consecutive naturals, for example, 1566935 + ... + 1948851.

It is an arithmetic number, because the mean of its divisors is an integer number (86816644965).

Almost surely, 2^671369220881 is an apocalyptic number.

It is an amenable number.

671369220881 is a deficient number, since it is larger than the sum of its proper divisors (23163938839).

671369220881 is a wasteful number, since it uses less digits than its factorization.

671369220881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442563.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 671369220881 in words is "six hundred seventy-one billion, three hundred sixty-nine million, two hundred twenty thousand, eight hundred eighty-one".