6651999696 has 20 divisors (see below), whose sum is σ = 17184332672. Its totient is φ = 2217333216.

The previous prime is 6651999691. The next prime is 6651999701. The reversal of 6651999696 is 6969991566.

It is an interprime number because it is at equal distance from previous prime (6651999691) and next prime (6651999701).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651999691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69291616 + ... + 69291711.

Almost surely, 2^6651999696 is an apocalyptic number.

It is an amenable number.

6651999696 is an abundant number, since it is smaller than the sum of its proper divisors (10532332976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6651999696 is a wasteful number, since it uses less digits than its factorization.

6651999696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138583338 (or 138583332 counting only the distinct ones).

The product of its digits is 42515280, while the sum is 66.

The square root of 6651999696 is about 81559.7921527513. The cubic root of 6651999696 is about 1880.6908295614.

The spelling of 6651999696 in words is "six billion, six hundred fifty-one million, nine hundred ninety-nine thousand, six hundred ninety-six".