667438733020 has 24 divisors (see below), whose sum is σ = 1403961300000. Its totient is φ = 266529786432.

The previous prime is 667438732999. The next prime is 667438733047. The reversal of 667438733020 is 20337834766.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 27844395 + ... + 27868354.

It is an arithmetic number, because the mean of its divisors is an integer number (58498387500).

Almost surely, 2^667438733020 is an apocalyptic number.

It is an amenable number.

667438733020 is an abundant number, since it is smaller than the sum of its proper divisors (736522566980).

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

667438733020 is a wasteful number, since it uses less digits than its factorization.

667438733020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55713357 (or 55713355 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 667438733020 in words is "six hundred sixty-seven billion, four hundred thirty-eight million, seven hundred thirty-three thousand, twenty".