1666315343 has 16 divisors (see below), whose sum is σ = 2082862080. Its totient is φ = 1295066400.

The previous prime is 1666315337. The next prime is 1666315349. The reversal of 1666315343 is 3435136661.

It is an interprime number because it is at equal distance from previous prime (1666315337) and next prime (1666315349).

It is a cyclic number.

It is not a de Polignac number, because 1666315343 - 2⁴ = 1666315327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666315297 and 1666315306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666315349) 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 15 ways as a sum of consecutive naturals, for example, 2138 + ... + 57768.

It is an arithmetic number, because the mean of its divisors is an integer number (130178880).

Almost surely, 2^1666315343 is an apocalyptic number.

1666315343 is a deficient number, since it is larger than the sum of its proper divisors (416546737).

1666315343 is a wasteful number, since it uses less digits than its factorization.

1666315343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56038.

The product of its digits is 116640, while the sum is 38.

The square root of 1666315343 is about 40820.5260010206. The cubic root of 1666315343 is about 1185.5477875892.

The spelling of 1666315343 in words is "one billion, six hundred sixty-six million, three hundred fifteen thousand, three hundred forty-three".