1161170661 has 8 divisors (see below), whose sum is σ = 1769402944. Its totient is φ = 663526080.

The previous prime is 1161170657. The next prime is 1161170671. The reversal of 1161170661 is 1660711611.

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

It is not a de Polignac number, because 1161170661 - 2² = 1161170657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161170651) 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, 27646900 + ... + 27646941.

It is an arithmetic number, because the mean of its divisors is an integer number (221175368).

Almost surely, 2^1161170661 is an apocalyptic number.

It is an amenable number.

1161170661 is a deficient number, since it is larger than the sum of its proper divisors (608232283).

1161170661 is an equidigital number, since it uses as much as digits as its factorization.

1161170661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55293851.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 1161170661 is about 34075.9542933136. The cubic root of 1161170661 is about 1051.0709137338.

The spelling of 1161170661 in words is "one billion, one hundred sixty-one million, one hundred seventy thousand, six hundred sixty-one".