166756543 has 2 divisors, whose sum is σ = 166756544. Its totient is φ = 166756542.

The previous prime is 166756531. The next prime is 166756547. The reversal of 166756543 is 345657661.

166756543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (345657661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166756543 - 2⁵ = 166756511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166756543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166756547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83378271 + 83378272.

It is an arithmetic number, because the mean of its divisors is an integer number (83378272).

Almost surely, 2^166756543 is an apocalyptic number.

166756543 is a deficient number, since it is larger than the sum of its proper divisors (1).

166756543 is an equidigital number, since it uses as much as digits as its factorization.

166756543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 166756543 is about 12913.4249136315. The cubic root of 166756543 is about 550.4201120777.

The spelling of 166756543 in words is "one hundred sixty-six million, seven hundred fifty-six thousand, five hundred forty-three".