667653344018 has 16 divisors (see below), whose sum is σ = 1021962868416. Its totient is φ = 327018647280.

The previous prime is 667653344009. The next prime is 667653344101. The reversal of 667653344018 is 810443356766.

It is a Harshad number since it is a multiple of its sum of digits (53).

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, 4829678 + ... + 4965993.

It is an arithmetic number, because the mean of its divisors is an integer number (63872679276).

Almost surely, 2^667653344018 is an apocalyptic number.

667653344018 is a deficient number, since it is larger than the sum of its proper divisors (354309524398).

667653344018 is a wasteful number, since it uses less digits than its factorization.

667653344018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9796369.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 667653344018 in words is "six hundred sixty-seven billion, six hundred fifty-three million, three hundred forty-four thousand, eighteen".