6664065898 has 16 divisors (see below), whose sum is σ = 11428029504. Its totient is φ = 2855049120.

The previous prime is 6664065887. The next prime is 6664065899. The reversal of 6664065898 is 8985604666.

It is not an unprimeable number, because it can be changed into a prime (6664065899) by changing a digit.

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, 38515 + ... + 121702.

It is an arithmetic number, because the mean of its divisors is an integer number (714251844).

Almost surely, 2^6664065898 is an apocalyptic number.

6664065898 is a deficient number, since it is larger than the sum of its proper divisors (4763963606).

6664065898 is a wasteful number, since it uses less digits than its factorization.

6664065898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163197.

The product of its (nonzero) digits is 14929920, while the sum is 58.

The square root of 6664065898 is about 81633.7301487565. The cubic root of 6664065898 is about 1881.8272842275.

The spelling of 6664065898 in words is "six billion, six hundred sixty-four million, sixty-five thousand, eight hundred ninety-eight".