1444166669 has 4 divisors (see below), whose sum is σ = 1575454560. Its totient is φ = 1312878780.

The previous prime is 1444166641. The next prime is 1444166693. The reversal of 1444166669 is 9666614441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444166669 is a prime.

It is a super-2 number, since 2×1444166669² = 4171234735701111122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444166629) 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, 65643929 + ... + 65643950.

It is an arithmetic number, because the mean of its divisors is an integer number (393863640).

Almost surely, 2^1444166669 is an apocalyptic number.

It is an amenable number.

1444166669 is a deficient number, since it is larger than the sum of its proper divisors (131287891).

1444166669 is a wasteful number, since it uses less digits than its factorization.

1444166669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131287890.

The product of its digits is 746496, while the sum is 47.

The square root of 1444166669 is about 38002.1929498812. The cubic root of 1444166669 is about 1130.3313485184.

The spelling of 1444166669 in words is "one billion, four hundred forty-four million, one hundred sixty-six thousand, six hundred sixty-nine".