6646240004 has 24 divisors (see below), whose sum is σ = 11816585760. Its totient is φ = 3270174336.

The previous prime is 6646239997. The next prime is 6646240021. The reversal of 6646240004 is 4000426466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260924 + ... + 285260.

It is an arithmetic number, because the mean of its divisors is an integer number (492357740).

Almost surely, 2^6646240004 is an apocalyptic number.

It is an amenable number.

6646240004 is a deficient number, since it is larger than the sum of its proper divisors (5170345756).

6646240004 is a wasteful number, since it uses less digits than its factorization.

6646240004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25427 (or 25425 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6646240004 is about 81524.4748771803. The cubic root of 6646240004 is about 1880.1478686319.

The spelling of 6646240004 in words is "six billion, six hundred forty-six million, two hundred forty thousand, four".