999660066999 has 8 divisors (see below), whose sum is σ = 1454051006592. Its totient is φ = 605854586040.

The previous prime is 999660066991. The next prime is 999660067009.

999660066999 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 999660066999 - 2³ = 999660066991 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999660066991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15146364619 + ... + 15146364684.

It is an arithmetic number, because the mean of its divisors is an integer number (181756375824).

Almost surely, 2^999660066999 is an apocalyptic number.

999660066999 is a deficient number, since it is larger than the sum of its proper divisors (454390939593).

999660066999 is a wasteful number, since it uses less digits than its factorization.

999660066999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30292729317.

The product of its (nonzero) digits is 688747536, while the sum is 78.

The spelling of 999660066999 in words is "nine hundred ninety-nine billion, six hundred sixty million, sixty-six thousand, nine hundred ninety-nine".