1161050661 has 6 divisors (see below), whose sum is σ = 1677073190. Its totient is φ = 774033768.

The previous prime is 1161050659. The next prime is 1161050731. The reversal of 1161050661 is 1660501611.

It can be written as a sum of positive squares in only one way, i.e., 1067328900 + 93721761 = 32670^2 + 9681^2 .

It is not a de Polignac number, because 1161050661 - 2¹ = 1161050659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161050621) 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 5 ways as a sum of consecutive naturals, for example, 64502806 + ... + 64502823.

Almost surely, 2^1161050661 is an apocalyptic number.

It is an amenable number.

1161050661 is a deficient number, since it is larger than the sum of its proper divisors (516022529).

1161050661 is a wasteful number, since it uses less digits than its factorization.

1161050661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129005635 (or 129005632 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1161050661 is about 34074.1934754148. The cubic root of 1161050661 is about 1051.0347052019.

The spelling of 1161050661 in words is "one billion, one hundred sixty-one million, fifty thousand, six hundred sixty-one".