990000000066 has 48 divisors (see below), whose sum is σ = 2512653069600. Its totient is φ = 257142856320.

The previous prime is 990000000061. The next prime is 990000000089. The reversal of 990000000066 is 660000000099.

990000000066 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 989999999970 and 990000000042.

It is not an unprimeable number, because it can be changed into a prime (990000000061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153057991 + ... + 153064458.

It is an arithmetic number, because the mean of its divisors is an integer number (52346938950).

Almost surely, 2^990000000066 is an apocalyptic number.

990000000066 is an abundant number, since it is smaller than the sum of its proper divisors (1522653069534).

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

990000000066 is a wasteful number, since it uses less digits than its factorization.

990000000066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306122479 (or 306122472 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The spelling of 990000000066 in words is "nine hundred ninety billion, sixty-six", and thus it is an aban number.