229921666 has 8 divisors (see below), whose sum is σ = 371411964. Its totient is φ = 106117680.

The previous prime is 229921661. The next prime is 229921667. The reversal of 229921666 is 666129922.

It can be written as a sum of positive squares in 2 ways, for example, as 176119441 + 53802225 = 13271^2 + 7335^2 .

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

It is not an unprimeable number, because it can be changed into a prime (229921661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4421545 + ... + 4421596.

Almost surely, 2^229921666 is an apocalyptic number.

229921666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

229921666 is a deficient number, since it is larger than the sum of its proper divisors (141490298).

229921666 is a wasteful number, since it uses less digits than its factorization.

229921666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843156.

The product of its digits is 139968, while the sum is 43.

The square root of 229921666 is about 15163.1680726687. The cubic root of 229921666 is about 612.6230021470.

The spelling of 229921666 in words is "two hundred twenty-nine million, nine hundred twenty-one thousand, six hundred sixty-six".