667485171344 has 20 divisors (see below), whose sum is σ = 1293278633724. Its totient is φ = 333735846528.

The previous prime is 667485171343. The next prime is 667485171383. The reversal of 667485171344 is 443171584766.

It can be written as a sum of positive squares in 2 ways, for example, as 201116371600 + 466368799744 = 448460^2 + 682912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 667485171344.

It is not an unprimeable number, because it can be changed into a prime (667485171343) 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, 450614 + ... + 1240170.

Almost surely, 2^667485171344 is an apocalyptic number.

It is an amenable number.

667485171344 is a deficient number, since it is larger than the sum of its proper divisors (625793462380).

667485171344 is a wasteful number, since it uses less digits than its factorization.

667485171344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842402 (or 842396 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 56.

The spelling of 667485171344 in words is "six hundred sixty-seven billion, four hundred eighty-five million, one hundred seventy-one thousand, three hundred forty-four".