667725054340 has 12 divisors (see below), whose sum is σ = 1402222614156. Its totient is φ = 267090021728.

The previous prime is 667725054331. The next prime is 667725054361. The reversal of 667725054340 is 43450527766.

It can be written as a sum of positive squares in 2 ways, for example, as 381202517056 + 286522537284 = 617416^2 + 535278^2 .

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 3 ways as a sum of consecutive naturals, for example, 16693126339 + ... + 16693126378.

It is an arithmetic number, because the mean of its divisors is an integer number (116851884513).

Almost surely, 2^667725054340 is an apocalyptic number.

It is an amenable number.

667725054340 is an abundant number, since it is smaller than the sum of its proper divisors (734497559816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667725054340 is a wasteful number, since it uses less digits than its factorization.

667725054340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33386252726 (or 33386252724 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 667725054340 in words is "six hundred sixty-seven billion, seven hundred twenty-five million, fifty-four thousand, three hundred forty".