667438702514 has 8 divisors (see below), whose sum is σ = 1017570481068. Its totient is φ = 328248542160.

The previous prime is 667438702457. The next prime is 667438702543. The reversal of 667438702514 is 415207834766.

It can be written as a sum of positive squares in 2 ways, for example, as 556538380225 + 110900322289 = 746015^2 + 333017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667438702514² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2735404397 + ... + 2735404640.

Almost surely, 2^667438702514 is an apocalyptic number.

667438702514 is a deficient number, since it is larger than the sum of its proper divisors (350131778554).

667438702514 is a wasteful number, since it uses less digits than its factorization.

667438702514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470809100.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 667438702514 in words is "six hundred sixty-seven billion, four hundred thirty-eight million, seven hundred two thousand, five hundred fourteen".