144681661 has 8 divisors (see below), whose sum is σ = 154655424. Its totient is φ = 135014880.

The previous prime is 144681643. The next prime is 144681673. The reversal of 144681661 is 166186441.

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

It is a cyclic number.

It is not a de Polignac number, because 144681661 - 2¹³ = 144673469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144681661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144681161) 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 7 ways as a sum of consecutive naturals, for example, 75771 + ... + 77656.

It is an arithmetic number, because the mean of its divisors is an integer number (19331928).

Almost surely, 2^144681661 is an apocalyptic number.

It is an amenable number.

144681661 is a deficient number, since it is larger than the sum of its proper divisors (9973763).

144681661 is a wasteful number, since it uses less digits than its factorization.

144681661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153491.

The product of its digits is 27648, while the sum is 37.

The square root of 144681661 is about 12028.3690083070. The cubic root of 144681661 is about 524.9740407421.

It can be divided in two parts, 14468 and 1661, that added together give a square (16129 = 127²).

The spelling of 144681661 in words is "one hundred forty-four million, six hundred eighty-one thousand, six hundred sixty-one".