667688533007 has 4 divisors (see below), whose sum is σ = 667723394760. Its totient is φ = 667653671256.

The previous prime is 667688532977. The next prime is 667688533013. The reversal of 667688533007 is 700335886766.

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 667688533007 - 2⁸ = 667688532751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667688533067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17402132 + ... + 17440457.

It is an arithmetic number, because the mean of its divisors is an integer number (166930848690).

Almost surely, 2^667688533007 is an apocalyptic number.

667688533007 is a deficient number, since it is larger than the sum of its proper divisors (34861753).

667688533007 is a wasteful number, since it uses less digits than its factorization.

667688533007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34861752.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 667688533007 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, five hundred thirty-three thousand, seven".