9661109075 has 36 divisors (see below), whose sum is σ = 12744541440. Its totient is φ = 7263587520.

The previous prime is 9661109071. The next prime is 9661109119. The reversal of 9661109075 is 5709011669.

It is a happy number.

It is not a de Polignac number, because 9661109075 - 2² = 9661109071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9661109071) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1141961 + ... + 1150389.

It is an arithmetic number, because the mean of its divisors is an integer number (354015040).

Almost surely, 2^9661109075 is an apocalyptic number.

9661109075 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9661109075 is a deficient number, since it is larger than the sum of its proper divisors (3083432365).

9661109075 is a wasteful number, since it uses less digits than its factorization.

9661109075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8604 (or 8580 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 9661109075 is about 98290.9409610062. The cubic root of 9661109075 is about 2129.8171924634.

The spelling of 9661109075 in words is "nine billion, six hundred sixty-one million, one hundred nine thousand, seventy-five".