667880617418 has 24 divisors (see below), whose sum is σ = 1165788806400. Its totient is φ = 286135007928.

The previous prime is 667880617409. The next prime is 667880617477. The reversal of 667880617418 is 814716088766.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 901448 + ... + 1465731.

It is an arithmetic number, because the mean of its divisors is an integer number (48574533600).

Almost surely, 2^667880617418 is an apocalyptic number.

667880617418 is a deficient number, since it is larger than the sum of its proper divisors (497908188982).

667880617418 is a wasteful number, since it uses less digits than its factorization.

667880617418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370074 (or 2370067 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 62.

The spelling of 667880617418 in words is "six hundred sixty-seven billion, eight hundred eighty million, six hundred seventeen thousand, four hundred eighteen".