6669966999 has 8 divisors (see below), whose sum is σ = 8917523200. Its totient is φ = 4434527736.

The previous prime is 6669966997. The next prime is 6669967001. The reversal of 6669966999 is 9996699666.

It is an interprime number because it is at equal distance from previous prime (6669966997) and next prime (6669967001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6669966999 - 2¹ = 6669966997 is a prime.

6669966999 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6669966999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669966997) 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, 3027949 + ... + 3030150.

It is an arithmetic number, because the mean of its divisors is an integer number (1114690400).

Almost surely, 2^6669966999 is an apocalyptic number.

6669966999 is a deficient number, since it is larger than the sum of its proper divisors (2247556201).

6669966999 is a wasteful number, since it uses less digits than its factorization.

6669966999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6058469.

The product of its digits is 459165024, while the sum is 75.

The square root of 6669966999 is about 81669.8659176076. The cubic root of 6669966999 is about 1882.3825796897.

The spelling of 6669966999 in words is "six billion, six hundred sixty-nine million, nine hundred sixty-six thousand, nine hundred ninety-nine".