667648584438 has 32 divisors (see below), whose sum is σ = 1490564287872. Its totient is φ = 197612688000.

The previous prime is 667648584437. The next prime is 667648584461. The reversal of 667648584438 is 834485846766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667648584433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117623763 + ... + 117629438.

It is an arithmetic number, because the mean of its divisors is an integer number (46580133996).

Almost surely, 2^667648584438 is an apocalyptic number.

667648584438 is an abundant number, since it is smaller than the sum of its proper divisors (822915703434).

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

667648584438 is a wasteful number, since it uses less digits than its factorization.

667648584438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235253260.

The product of its digits is 743178240, while the sum is 69.

The spelling of 667648584438 in words is "six hundred sixty-seven billion, six hundred forty-eight million, five hundred eighty-four thousand, four hundred thirty-eight".