9866465280 has 416 divisors, whose sum is σ = 40103136000. Its totient is φ = 2254307328.

The previous prime is 9866465267. The next prime is 9866465317. The reversal of 9866465280 is 825646689.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3869446 + ... + 3871994.

Almost surely, 2^9866465280 is an apocalyptic number.

9866465280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9866465280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20051568000).

9866465280 is an abundant number, since it is smaller than the sum of its proper divisors (30236670720).

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

9866465280 is a wasteful number, since it uses less digits than its factorization.

9866465280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2566 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The square root of 9866465280 is about 99330.0824523971. The cubic root of 9866465280 is about 2144.8019573625.

The spelling of 9866465280 in words is "nine billion, eight hundred sixty-six million, four hundred sixty-five thousand, two hundred eighty".