540440666 has 8 divisors (see below), whose sum is σ = 813653184. Its totient is φ = 269222940.

The previous prime is 540440653. The next prime is 540440669. The reversal of 540440666 is 666044045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×540440666² = 584152226933047112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (540440669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498020 + ... + 499103.

It is an arithmetic number, because the mean of its divisors is an integer number (101706648).

Almost surely, 2^540440666 is an apocalyptic number.

540440666 is a deficient number, since it is larger than the sum of its proper divisors (273212518).

540440666 is a wasteful number, since it uses less digits than its factorization.

540440666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997396.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 540440666 is about 23247.3797663307. The cubic root of 540440666 is about 814.5467342986.

The spelling of 540440666 in words is "five hundred forty million, four hundred forty thousand, six hundred sixty-six".