6504440666 has 16 divisors (see below), whose sum is σ = 10049696448. Its totient is φ = 3155544000.

The previous prime is 6504440617. The next prime is 6504440681. The reversal of 6504440666 is 6660444056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237455 + ... + 263426.

It is an arithmetic number, because the mean of its divisors is an integer number (628106028).

Almost surely, 2^6504440666 is an apocalyptic number.

6504440666 is a deficient number, since it is larger than the sum of its proper divisors (3545255782).

6504440666 is a wasteful number, since it uses less digits than its factorization.

6504440666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501077.

The product of its (nonzero) digits is 414720, while the sum is 41.

The square root of 6504440666 is about 80650.1126223640. The cubic root of 6504440666 is about 1866.6804774418.

The spelling of 6504440666 in words is "six billion, five hundred four million, four hundred forty thousand, six hundred sixty-six".