667944223229 has 16 divisors (see below), whose sum is σ = 683715237120. Its totient is φ = 652292222400.

The previous prime is 667944223189. The next prime is 667944223369. The reversal of 667944223229 is 922322449766.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667944223229 is a prime.

It is a super-2 number, since 2×667944223229² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667944423229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62706554 + ... + 62717204.

It is an arithmetic number, because the mean of its divisors is an integer number (42732202320).

Almost surely, 2^667944223229 is an apocalyptic number.

It is an amenable number.

667944223229 is a deficient number, since it is larger than the sum of its proper divisors (15771013891).

667944223229 is a wasteful number, since it uses less digits than its factorization.

667944223229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16100.

The product of its digits is 15676416, while the sum is 56.

The spelling of 667944223229 in words is "six hundred sixty-seven billion, nine hundred forty-four million, two hundred twenty-three thousand, two hundred twenty-nine".