144655666 has 4 divisors (see below), whose sum is σ = 216983502. Its totient is φ = 72327832.

The previous prime is 144655661. The next prime is 144655673. The reversal of 144655666 is 666556441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666556441 = 179 ⋅3723779.

It can be written as a sum of positive squares in only one way, i.e., 101425041 + 43230625 = 10071^2 + 6575^2 .

It is not an unprimeable number, because it can be changed into a prime (144655661) 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 as a sum of consecutive naturals, namely, 36163915 + ... + 36163918.

Almost surely, 2^144655666 is an apocalyptic number.

144655666 is a deficient number, since it is larger than the sum of its proper divisors (72327836).

144655666 is an equidigital number, since it uses as much as digits as its factorization.

144655666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72327835.

The product of its digits is 518400, while the sum is 43.

The square root of 144655666 is about 12027.2883893253. The cubic root of 144655666 is about 524.9425981081.

The spelling of 144655666 in words is "one hundred forty-four million, six hundred fifty-five thousand, six hundred sixty-six".