221407166 has 8 divisors (see below), whose sum is σ = 332293320. Its totient is φ = 110642728.

The previous prime is 221407163. The next prime is 221407187. The reversal of 221407166 is 661704122.

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

It is a super-2 number, since 2×221407166² = 98042266312303112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221407163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25736 + ... + 33243.

It is an arithmetic number, because the mean of its divisors is an integer number (41536665).

Almost surely, 2^221407166 is an apocalyptic number.

221407166 is a deficient number, since it is larger than the sum of its proper divisors (110886154).

221407166 is a wasteful number, since it uses less digits than its factorization.

221407166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60858.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 221407166 is about 14879.7569200575. The cubic root of 221407166 is about 604.9654293476.

The spelling of 221407166 in words is "two hundred twenty-one million, four hundred seven thousand, one hundred sixty-six".