666679222 has 16 divisors (see below), whose sum is σ = 1092409344. Its totient is φ = 302625000.

The previous prime is 666679217. The next prime is 666679249. The reversal of 666679222 is 222976666.

It is a super-2 number, since 2×666679222² = 888922370093050568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3654 + ... + 36697.

It is an arithmetic number, because the mean of its divisors is an integer number (68275584).

Almost surely, 2^666679222 is an apocalyptic number.

666679222 is a deficient number, since it is larger than the sum of its proper divisors (425730122).

666679222 is a wasteful number, since it uses less digits than its factorization.

666679222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41115.

The product of its digits is 653184, while the sum is 46.

The square root of 666679222 is about 25820.1321065559. The cubic root of 666679222 is about 873.5859487488.

The spelling of 666679222 in words is "six hundred sixty-six million, six hundred seventy-nine thousand, two hundred twenty-two".