672440172671 has 2 divisors, whose sum is σ = 672440172672. Its totient is φ = 672440172670.

The previous prime is 672440172623. The next prime is 672440172689. The reversal of 672440172671 is 176271044276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 672440172671 - 2¹⁰ = 672440171647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672440172571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336220086335 + 336220086336.

It is an arithmetic number, because the mean of its divisors is an integer number (336220086336).

Almost surely, 2^672440172671 is an apocalyptic number.

672440172671 is a deficient number, since it is larger than the sum of its proper divisors (1).

672440172671 is an equidigital number, since it uses as much as digits as its factorization.

672440172671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 672440172671 in words is "six hundred seventy-two billion, four hundred forty million, one hundred seventy-two thousand, six hundred seventy-one".