9547371666 has 160 divisors (see below), whose sum is σ = 25968729600. Its totient is φ = 2559320064.

The previous prime is 9547371637. The next prime is 9547371667. The reversal of 9547371666 is 6661737459.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (9547371667) 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 79 ways as a sum of consecutive naturals, for example, 8655271 + ... + 8656373.

It is an arithmetic number, because the mean of its divisors is an integer number (162304560).

Almost surely, 2^9547371666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9547371666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12984364800).

9547371666 is an abundant number, since it is smaller than the sum of its proper divisors (16421357934).

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

9547371666 is a wasteful number, since it uses less digits than its factorization.

9547371666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1581 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The square root of 9547371666 is about 97710.6527764501. The cubic root of 9547371666 is about 2121.4262730833.

The spelling of 9547371666 in words is "nine billion, five hundred forty-seven million, three hundred seventy-one thousand, six hundred sixty-six".