144407666 has 8 divisors (see below), whose sum is σ = 233273964. Its totient is φ = 66649680.

The previous prime is 144407647. The next prime is 144407677. The reversal of 144407666 is 666704441.

It can be written as a sum of positive squares in 2 ways, for example, as 137569441 + 6838225 = 11729^2 + 2615^2 .

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

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, 2777045 + ... + 2777096.

Almost surely, 2^144407666 is an apocalyptic number.

144407666 is a deficient number, since it is larger than the sum of its proper divisors (88866298).

144407666 is a wasteful number, since it uses less digits than its factorization.

144407666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554156.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 144407666 is about 12016.9740783610. The cubic root of 144407666 is about 524.6424364981.

The spelling of 144407666 in words is "one hundred forty-four million, four hundred seven thousand, six hundred sixty-six".