1666789341 has 24 divisors (see below), whose sum is σ = 2640240000. Its totient is φ = 932182272.

The previous prime is 1666789331. The next prime is 1666789343. The reversal of 1666789341 is 1439876661.

It is a happy number.

It is not a de Polignac number, because 1666789341 - 2⁵ = 1666789309 is a prime.

It is a super-3 number, since 3×1666789341³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666789343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113716 + ... + 127533.

It is an arithmetic number, because the mean of its divisors is an integer number (110010000).

Almost surely, 2^1666789341 is an apocalyptic number.

It is an amenable number.

1666789341 is a deficient number, since it is larger than the sum of its proper divisors (973450659).

1666789341 is a wasteful number, since it uses less digits than its factorization.

1666789341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241313 (or 241306 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 1666789341 is about 40826.3314663466. The cubic root of 1666789341 is about 1185.6601900840.

The spelling of 1666789341 in words is "one billion, six hundred sixty-six million, seven hundred eighty-nine thousand, three hundred forty-one".