667606147675667 has 4 divisors (see below), whose sum is σ = 667607759058240. Its totient is φ = 667604536293096.

The previous prime is 667606147675661. The next prime is 667606147675669. The reversal of 667606147675667 is 766576741606766.

It is a happy number.

667606147675667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667606147675667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667606147675591 and 667606147675600.

It is not an unprimeable number, because it can be changed into a prime (667606147675661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805069667 + ... + 805898492.

It is an arithmetic number, because the mean of its divisors is an integer number (166901939764560).

Almost surely, 2^{667606147675667} is an apocalyptic number.

667606147675667 is a deficient number, since it is larger than the sum of its proper divisors (1611382573).

667606147675667 is a wasteful number, since it uses less digits than its factorization.

667606147675667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611382572.

The product of its (nonzero) digits is 13442526720, while the sum is 80.

The spelling of 667606147675667 in words is "six hundred sixty-seven trillion, six hundred six billion, one hundred forty-seven million, six hundred seventy-five thousand, six hundred sixty-seven".