9966699966 has 8 divisors (see below), whose sum is σ = 19933399944. Its totient is φ = 3322233320.

The previous prime is 9966699937. The next prime is 9966699991. The reversal of 9966699966 is 6699966699.

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

9966699966 is an admirable number.

9966699966 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a congruent 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, 830558325 + ... + 830558336.

It is an arithmetic number, because the mean of its divisors is an integer number (2491674993).

Almost surely, 2^9966699966 is an apocalyptic number.

9966699966 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.

9966699966 is a wasteful number, since it uses less digits than its factorization.

9966699966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661116666.

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

The square root of 9966699966 is about 99833.3609871971. The cubic root of 9966699966 is about 2152.0406056781.

The spelling of 9966699966 in words is "nine billion, nine hundred sixty-six million, six hundred ninety-nine thousand, nine hundred sixty-six".