999660067000 has 256 divisors, whose sum is σ = 2688994713600. Its totient is φ = 340745932800.

The previous prime is 999660066991. The next prime is 999660067009. The reversal of 999660067000 is 760066999.

It is an interprime number because it is at equal distance from previous prime (999660066991) and next prime (999660067009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999660067009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1485378664 + ... + 1485379336.

It is an arithmetic number, because the mean of its divisors is an integer number (10503885600).

Almost surely, 2^999660067000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999660067000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344497356800).

999660067000 is an abundant number, since it is smaller than the sum of its proper divisors (1689334646600).

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

999660067000 is a wasteful number, since it uses less digits than its factorization.

999660067000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 999660067000 in words is "nine hundred ninety-nine billion, six hundred sixty million, sixty-seven thousand".