9866204380 has 12 divisors (see below), whose sum is σ = 20719029240. Its totient is φ = 3946481744.

The previous prime is 9866204363. The next prime is 9866204417. The reversal of 9866204380 is 834026689.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9866204380.

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, 246655090 + ... + 246655129.

It is an arithmetic number, because the mean of its divisors is an integer number (1726585770).

Almost surely, 2^9866204380 is an apocalyptic number.

It is an amenable number.

9866204380 is an abundant number, since it is smaller than the sum of its proper divisors (10852824860).

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

9866204380 is a wasteful number, since it uses less digits than its factorization.

9866204380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493310228 (or 493310226 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 9866204380 is about 99328.7691457012. The cubic root of 9866204380 is about 2144.7830521198.

The spelling of 9866204380 in words is "nine billion, eight hundred sixty-six million, two hundred four thousand, three hundred eighty".