9666000981 has 96 divisors (see below), whose sum is σ = 18539539200. Its totient is φ = 4707735552.

The previous prime is 9666000959. The next prime is 9666001057. The reversal of 9666000981 is 1890006669.

It is not a de Polignac number, because 9666000981 - 2¹¹ = 9665998933 is a prime.

It is a super-2 number, since 2×9666000981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666004981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 731370 + ... + 744468.

It is an arithmetic number, because the mean of its divisors is an integer number (193120200).

Almost surely, 2^9666000981 is an apocalyptic number.

9666000981 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9666000981 is the 56763-rd octagonal number.

It is an amenable number.

9666000981 is a deficient number, since it is larger than the sum of its proper divisors (8873538219).

9666000981 is a wasteful number, since it uses less digits than its factorization.

9666000981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195 (or 13192 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 9666000981 is about 98315.8226380678. The cubic root of 9666000981 is about 2130.1766097030.

The spelling of 9666000981 in words is "nine billion, six hundred sixty-six million, nine hundred eighty-one", and thus it is an aban number.