400666222 has 8 divisors (see below), whose sum is σ = 655635672. Its totient is φ = 182121000.

The previous prime is 400666213. The next prime is 400666237. The reversal of 400666222 is 222666004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9106029 + ... + 9106072.

It is an arithmetic number, because the mean of its divisors is an integer number (81954459).

Almost surely, 2^400666222 is an apocalyptic number.

400666222 is a deficient number, since it is larger than the sum of its proper divisors (254969450).

400666222 is a wasteful number, since it uses less digits than its factorization.

400666222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212114.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 400666222 is about 20016.6486205858. The cubic root of 400666222 is about 737.2151366374.

The spelling of 400666222 in words is "four hundred million, six hundred sixty-six thousand, two hundred twenty-two".