667227373221 has 8 divisors (see below), whose sum is σ = 941968056384. Its totient is φ = 418652469440.

The previous prime is 667227373217. The next prime is 667227373231. The reversal of 667227373221 is 122373722766.

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 667227373221 - 2² = 667227373217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667227373231) 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, 6541444785 + ... + 6541444886.

It is an arithmetic number, because the mean of its divisors is an integer number (117746007048).

Almost surely, 2^667227373221 is an apocalyptic number.

It is an amenable number.

667227373221 is a deficient number, since it is larger than the sum of its proper divisors (274740683163).

667227373221 is a wasteful number, since it uses less digits than its factorization.

667227373221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13082889691.

The product of its digits is 1778112, while the sum is 48.

The spelling of 667227373221 in words is "six hundred sixty-seven billion, two hundred twenty-seven million, three hundred seventy-three thousand, two hundred twenty-one".