540666745 has 4 divisors (see below), whose sum is σ = 648800100. Its totient is φ = 432533392.

The previous prime is 540666739. The next prime is 540666779. The reversal of 540666745 is 547666045.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89359209 + 451307536 = 9453^2 + 21244^2 .

It is a cyclic number.

It is not a de Polignac number, because 540666745 - 2¹⁹ = 540142457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54066670 + ... + 54066679.

It is an arithmetic number, because the mean of its divisors is an integer number (162200025).

Almost surely, 2^540666745 is an apocalyptic number.

It is an amenable number.

540666745 is a deficient number, since it is larger than the sum of its proper divisors (108133355).

540666745 is a wasteful number, since it uses less digits than its factorization.

540666745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108133354.

The product of its (nonzero) digits is 604800, while the sum is 43.

The square root of 540666745 is about 23252.2417198858. The cubic root of 540666745 is about 814.6602997957.

The spelling of 540666745 in words is "five hundred forty million, six hundred sixty-six thousand, seven hundred forty-five".