345666543 has 16 divisors (see below), whose sum is σ = 473955456. Its totient is φ = 223927200.

The previous prime is 345666539. The next prime is 345666547.

It is a happy number.

345666543 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (345666539) and next prime (345666547).

It is not a de Polignac number, because 345666543 - 2² = 345666539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345666495 and 345666504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345666547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115180 + ... + 118142.

It is an arithmetic number, because the mean of its divisors is an integer number (29622216).

Almost surely, 2^345666543 is an apocalyptic number.

345666543 is a deficient number, since it is larger than the sum of its proper divisors (128288913).

345666543 is a wasteful number, since it uses less digits than its factorization.

345666543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054.

The product of its digits is 777600, while the sum is 42.

The square root of 345666543 is about 18592.1096973958. The cubic root of 345666543 is about 701.8092943067.

The spelling of 345666543 in words is "three hundred forty-five million, six hundred sixty-six thousand, five hundred forty-three".