667646828533 has 8 divisors (see below), whose sum is σ = 683201835008. Its totient is φ = 652093110144.

The previous prime is 667646828531. The next prime is 667646828581. The reversal of 667646828533 is 335828646766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667646828533 - 2¹ = 667646828531 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 (667646828531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769285 + ... + 1388197.

It is an arithmetic number, because the mean of its divisors is an integer number (85400229376).

Almost surely, 2^667646828533 is an apocalyptic number.

It is an amenable number.

667646828533 is a deficient number, since it is larger than the sum of its proper divisors (15555006475).

667646828533 is a wasteful number, since it uses less digits than its factorization.

667646828533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644043.

The product of its digits is 209018880, while the sum is 64.

The spelling of 667646828533 in words is "six hundred sixty-seven billion, six hundred forty-six million, eight hundred twenty-eight thousand, five hundred thirty-three".