667672448434 has 16 divisors (see below), whose sum is σ = 1006763399640. Its totient is φ = 332084874240.

The previous prime is 667672448423. The next prime is 667672448459. The reversal of 667672448434 is 434844276766.

It can be written as a sum of positive squares in 4 ways, for example, as 497596214025 + 170076234409 = 705405^2 + 412403^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 7032472 + ... + 7126780.

Almost surely, 2^667672448434 is an apocalyptic number.

667672448434 is a deficient number, since it is larger than the sum of its proper divisors (339090951206).

667672448434 is a wasteful number, since it uses less digits than its factorization.

667672448434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112845.

The product of its digits is 130056192, while the sum is 61.

The spelling of 667672448434 in words is "six hundred sixty-seven billion, six hundred seventy-two million, four hundred forty-eight thousand, four hundred thirty-four".