225001666 has 8 divisors (see below), whose sum is σ = 337614480. Its totient is φ = 112463508.

The previous prime is 225001661. The next prime is 225001669. The reversal of 225001666 is 666100522.

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

It is a super-4 number, since 4×225001666⁴ (a number of 35 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (225001661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10396 + ... + 23623.

It is an arithmetic number, because the mean of its divisors is an integer number (42201810).

Almost surely, 2^225001666 is an apocalyptic number.

225001666 is a deficient number, since it is larger than the sum of its proper divisors (112612814).

225001666 is a wasteful number, since it uses less digits than its factorization.

225001666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37328.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 225001666 is about 15000.0555332305. The cubic root of 225001666 is about 608.2217007312.

The spelling of 225001666 in words is "two hundred twenty-five million, one thousand, six hundred sixty-six".