9866899497 has 32 divisors (see below), whose sum is σ = 16568409088. Its totient is φ = 5083477056.

The previous prime is 9866899489. The next prime is 9866899507. The reversal of 9866899497 is 7949986689.

It is not a de Polignac number, because 9866899497 - 2³ = 9866899489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9866899597) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408523 + ... + 432000.

It is an arithmetic number, because the mean of its divisors is an integer number (517762784).

Almost surely, 2^9866899497 is an apocalyptic number.

It is an amenable number.

9866899497 is a deficient number, since it is larger than the sum of its proper divisors (6701509591).

9866899497 is a wasteful number, since it uses less digits than its factorization.

9866899497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840589.

The product of its digits is 423263232, while the sum is 75.

The square root of 9866899497 is about 99332.2681559220. The cubic root of 9866899497 is about 2144.8334207010.

The spelling of 9866899497 in words is "nine billion, eight hundred sixty-six million, eight hundred ninety-nine thousand, four hundred ninety-seven".