667667663675 has 6 divisors (see below), whose sum is σ = 827907902988. Its totient is φ = 534134130920.

The previous prime is 667667663671. The next prime is 667667663699. The reversal of 667667663675 is 576366766766.

It is not a de Polignac number, because 667667663675 - 2² = 667667663671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667667663599 and 667667663608.

It is not an unprimeable number, because it can be changed into a prime (667667663671) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 13353353249 + ... + 13353353298.

It is an arithmetic number, because the mean of its divisors is an integer number (137984650498).

Almost surely, 2^667667663675 is an apocalyptic number.

667667663675 is a deficient number, since it is larger than the sum of its proper divisors (160240239313).

667667663675 is a wasteful number, since it uses less digits than its factorization.

667667663675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26706706557 (or 26706706552 counting only the distinct ones).

The product of its digits is 1440270720, while the sum is 71.

The spelling of 667667663675 in words is "six hundred sixty-seven billion, six hundred sixty-seven million, six hundred sixty-three thousand, six hundred seventy-five".