6665452543 has 8 divisors (see below), whose sum is σ = 6812916480. Its totient is φ = 6519566040.

The previous prime is 6665452513. The next prime is 6665452649. The reversal of 6665452543 is 3452545666.

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 6665452543 - 2¹³ = 6665444351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6665452493 and 6665452502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665452513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385813 + ... + 402718.

It is an arithmetic number, because the mean of its divisors is an integer number (851614560).

Almost surely, 2^6665452543 is an apocalyptic number.

6665452543 is a deficient number, since it is larger than the sum of its proper divisors (147463937).

6665452543 is a wasteful number, since it uses less digits than its factorization.

6665452543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788717.

The product of its digits is 2592000, while the sum is 46.

The square root of 6665452543 is about 81642.2227955609. Note that the first 3 decimals coincide. The cubic root of 6665452543 is about 1881.9577974141.

The spelling of 6665452543 in words is "six billion, six hundred sixty-five million, four hundred fifty-two thousand, five hundred forty-three".