1668119489 has 4 divisors (see below), whose sum is σ = 1668203520. Its totient is φ = 1668035460.

The previous prime is 1668119477. The next prime is 1668119491. The reversal of 1668119489 is 9849118661.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9849118661 = 64399 ⋅152939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668119489 is a prime.

It is a super-2 number, since 2×1668119489² = 5565245259163242242, which contains 22 as substring.

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 1668119489.

It is not an unprimeable number, because it can be changed into a prime (1668119419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6224 + ... + 58094.

It is an arithmetic number, because the mean of its divisors is an integer number (417050880).

Almost surely, 2^1668119489 is an apocalyptic number.

It is an amenable number.

1668119489 is a deficient number, since it is larger than the sum of its proper divisors (84031).

1668119489 is an equidigital number, since it uses as much as digits as its factorization.

1668119489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84030.

The product of its digits is 746496, while the sum is 53.

The square root of 1668119489 is about 40842.6185375032. The cubic root of 1668119489 is about 1185.9755037137.

The spelling of 1668119489 in words is "one billion, six hundred sixty-eight million, one hundred nineteen thousand, four hundred eighty-nine".