540660065 has 12 divisors (see below), whose sum is σ = 713135892. Its totient is φ = 393206880.

The previous prime is 540660053. The next prime is 540660073. The reversal of 540660065 is 560066045.

It can be written as a sum of positive squares in 2 ways, for example, as 125641681 + 415018384 = 11209^2 + 20372^2 .

It is not a de Polignac number, because 540660065 - 2¹⁶ = 540594529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446222 + ... + 447431.

It is an arithmetic number, because the mean of its divisors is an integer number (59427991).

Almost surely, 2^540660065 is an apocalyptic number.

540660065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

540660065 is a deficient number, since it is larger than the sum of its proper divisors (172475827).

540660065 is a wasteful number, since it uses less digits than its factorization.

540660065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893680 (or 893669 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 540660065 is about 23252.0980773779. The cubic root of 540660065 is about 814.6569447079.

The spelling of 540660065 in words is "five hundred forty million, six hundred sixty thousand, sixty-five".