667212313672 has 16 divisors (see below), whose sum is σ = 1251032263740. Its totient is φ = 333603710016.

The previous prime is 667212313661. The next prime is 667212313673. The reversal of 667212313672 is 276313212766.

It can be written as a sum of positive squares in 2 ways, for example, as 666420791716 + 791521956 = 816346^2 + 28134^2 .

It is not an unprimeable number, because it can be changed into a prime (667212313673) 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, 1437778 + ... + 1844350.

Almost surely, 2^667212313672 is an apocalyptic number.

It is an amenable number.

667212313672 is a deficient number, since it is larger than the sum of its proper divisors (583819950068).

667212313672 is a wasteful number, since it uses less digits than its factorization.

667212313672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611712 (or 611708 counting only the distinct ones).

The product of its digits is 762048, while the sum is 46.

The spelling of 667212313672 in words is "six hundred sixty-seven billion, two hundred twelve million, three hundred thirteen thousand, six hundred seventy-two".