1171010661 has 16 divisors (see below), whose sum is σ = 1638351360. Its totient is φ = 742551920.

The previous prime is 1171010591. The next prime is 1171010681. The reversal of 1171010661 is 1660101711.

It is a cyclic number.

It is not a de Polignac number, because 1171010661 - 2¹⁵ = 1170977893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171010681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35055 + ... + 59756.

It is an arithmetic number, because the mean of its divisors is an integer number (102396960).

Almost surely, 2^1171010661 is an apocalyptic number.

It is an amenable number.

1171010661 is a deficient number, since it is larger than the sum of its proper divisors (467340699).

1171010661 is a wasteful number, since it uses less digits than its factorization.

1171010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95016.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 1171010661 is about 34220.0330362202. The cubic root of 1171010661 is about 1054.0315636975.

The spelling of 1171010661 in words is "one billion, one hundred seventy-one million, ten thousand, six hundred sixty-one".