6646758634 has 16 divisors (see below), whose sum is σ = 10735545600. Its totient is φ = 3074870464.

The previous prime is 6646758631. The next prime is 6646758647. The reversal of 6646758634 is 4368576466.

It is not an unprimeable number, because it can be changed into a prime (6646758631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654714 + ... + 1658725.

It is an arithmetic number, because the mean of its divisors is an integer number (670971600).

Almost surely, 2^6646758634 is an apocalyptic number.

6646758634 is a deficient number, since it is larger than the sum of its proper divisors (4088786966).

6646758634 is a wasteful number, since it uses less digits than its factorization.

6646758634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313517.

The product of its digits is 17418240, while the sum is 55.

The square root of 6646758634 is about 81527.6556390529. The cubic root of 6646758634 is about 1880.1967722589.

The spelling of 6646758634 in words is "six billion, six hundred forty-six million, seven hundred fifty-eight thousand, six hundred thirty-four".