667703676827 has 4 divisors (see below), whose sum is σ = 728404011096. Its totient is φ = 607003342560.

The previous prime is 667703676817. The next prime is 667703676889. The reversal of 667703676827 is 728676307766.

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

It is a cyclic number.

It is not a de Polignac number, because 667703676827 - 2⁴ = 667703676811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667703676817) 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, 30350167118 + ... + 30350167139.

It is an arithmetic number, because the mean of its divisors is an integer number (182101002774).

Almost surely, 2^667703676827 is an apocalyptic number.

667703676827 is a deficient number, since it is larger than the sum of its proper divisors (60700334269).

667703676827 is a wasteful number, since it uses less digits than its factorization.

667703676827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60700334268.

The product of its (nonzero) digits is 149361408, while the sum is 65.

The spelling of 667703676827 in words is "six hundred sixty-seven billion, seven hundred three million, six hundred seventy-six thousand, eight hundred twenty-seven".