540646666 has 8 divisors (see below), whose sum is σ = 926822880. Its totient is φ = 231705708.

The previous prime is 540646643. The next prime is 540646679. The reversal of 540646666 is 666646045.

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

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, 19308796 + ... + 19308823.

It is an arithmetic number, because the mean of its divisors is an integer number (115852860).

Almost surely, 2^540646666 is an apocalyptic number.

540646666 is a deficient number, since it is larger than the sum of its proper divisors (386176214).

540646666 is a wasteful number, since it uses less digits than its factorization.

540646666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38617628.

The product of its (nonzero) digits is 622080, while the sum is 43.

The square root of 540646666 is about 23251.8099510554. The cubic root of 540646666 is about 814.6502148609.

The spelling of 540646666 in words is "five hundred forty million, six hundred forty-six thousand, six hundred sixty-six".