667233256667 has 4 divisors (see below), whose sum is σ = 667880428656. Its totient is φ = 666586084680.

The previous prime is 667233256661. The next prime is 667233256693. The reversal of 667233256667 is 766652332766.

It is a happy number.

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 667233256667 - 2¹⁰ = 667233255643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667233256661) 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, 323584448 + ... + 323586509.

It is an arithmetic number, because the mean of its divisors is an integer number (166970107164).

Almost surely, 2^667233256667 is an apocalyptic number.

667233256667 is a deficient number, since it is larger than the sum of its proper divisors (647171989).

667233256667 is a wasteful number, since it uses less digits than its factorization.

667233256667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647171988.

The product of its digits is 68584320, while the sum is 59.

The spelling of 667233256667 in words is "six hundred sixty-seven billion, two hundred thirty-three million, two hundred fifty-six thousand, six hundred sixty-seven".