6661959196 has 12 divisors (see below), whose sum is σ = 11742303160. Its totient is φ = 3307015440.

The previous prime is 6661959173. The next prime is 6661959197. The reversal of 6661959196 is 6919591666.

It is a self number, because there is not a number n which added to its sum of digits gives 6661959196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661959197) 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, 5990415 + ... + 5991526.

Almost surely, 2^6661959196 is an apocalyptic number.

It is an amenable number.

6661959196 is a deficient number, since it is larger than the sum of its proper divisors (5080343964).

6661959196 is a wasteful number, since it uses less digits than its factorization.

6661959196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11982084 (or 11982082 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 58.

The square root of 6661959196 is about 81620.8257493147. The cubic root of 6661959196 is about 1881.6289635028.

The spelling of 6661959196 in words is "six billion, six hundred sixty-one million, nine hundred fifty-nine thousand, one hundred ninety-six".