6665989036 has 12 divisors (see below), whose sum is σ = 13331978128. Its totient is φ = 2856852432.

The previous prime is 6665989027. The next prime is 6665989069. The reversal of 6665989036 is 6309895666.

It is a happy number.

6665989036 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119035491 + ... + 119035546.

Almost surely, 2^6665989036 is an apocalyptic number.

It is an amenable number.

6665989036 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6665989036 is a wasteful number, since it uses less digits than its factorization.

6665989036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238071048 (or 238071046 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 58.

The square root of 6665989036 is about 81645.5083639021. The cubic root of 6665989036 is about 1882.0082881142.

The spelling of 6665989036 in words is "six billion, six hundred sixty-five million, nine hundred eighty-nine thousand, thirty-six".