1161665061 has 8 divisors (see below), whose sum is σ = 1590748704. Its totient is φ = 753512400.

The previous prime is 1161665051. The next prime is 1161665083. The reversal of 1161665061 is 1605661611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1161665061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161665051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5232615 + ... + 5232836.

It is an arithmetic number, because the mean of its divisors is an integer number (198843588).

Almost surely, 2^1161665061 is an apocalyptic number.

It is an amenable number.

1161665061 is a deficient number, since it is larger than the sum of its proper divisors (429083643).

1161665061 is a wasteful number, since it uses less digits than its factorization.

1161665061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10465491.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1161665061 is about 34083.2079035997. The cubic root of 1161665061 is about 1051.2200665796.

The spelling of 1161665061 in words is "one billion, one hundred sixty-one million, six hundred sixty-five thousand, sixty-one".