667710404440 has 32 divisors (see below), whose sum is σ = 1502684084160. Its totient is φ = 267024486400.

The previous prime is 667710404423. The next prime is 667710404467. The reversal of 667710404440 is 44404017766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683376 + ... + 2041855.

It is an arithmetic number, because the mean of its divisors is an integer number (46958877630).

Almost surely, 2^667710404440 is an apocalyptic number.

It is an amenable number.

667710404440 is an abundant number, since it is smaller than the sum of its proper divisors (834973679720).

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

667710404440 is a wasteful number, since it uses less digits than its factorization.

667710404440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729723 (or 3729719 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 667710404440 in words is "six hundred sixty-seven billion, seven hundred ten million, four hundred four thousand, four hundred forty".