667781012223 has 24 divisors (see below), whose sum is σ = 1044774948672. Its totient is φ = 408566760768.

The previous prime is 667781012149. The next prime is 667781012237. The reversal of 667781012223 is 322210187766.

It is not a de Polignac number, because 667781012223 - 2²² = 667776817919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667781012243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16475511 + ... + 16515992.

It is an arithmetic number, because the mean of its divisors is an integer number (43532289528).

Almost surely, 2^667781012223 is an apocalyptic number.

667781012223 is a deficient number, since it is larger than the sum of its proper divisors (376993936449).

667781012223 is a wasteful number, since it uses less digits than its factorization.

667781012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32991695 (or 32991692 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

Adding to 667781012223 its reverse (322210187766), we get a palindrome (989991199989).

The spelling of 667781012223 in words is "six hundred sixty-seven billion, seven hundred eighty-one million, twelve thousand, two hundred twenty-three".