1162611661 has 2 divisors, whose sum is σ = 1162611662. Its totient is φ = 1162611660.

The previous prime is 1162611649. The next prime is 1162611673. The reversal of 1162611661 is 1661162611.

It is a balanced prime because it is at equal distance from previous prime (1162611649) and next prime (1162611673).

It can be written as a sum of positive squares in only one way, i.e., 1127683561 + 34928100 = 33581^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1162611661 - 2⁵ = 1162611629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1162611641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581305830 + 581305831.

It is an arithmetic number, because the mean of its divisors is an integer number (581305831).

Almost surely, 2^1162611661 is an apocalyptic number.

It is an amenable number.

1162611661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1162611661 is an equidigital number, since it uses as much as digits as its factorization.

1162611661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 1162611661 is about 34097.0916794967. The cubic root of 1162611661 is about 1051.5055231437.

The spelling of 1162611661 in words is "one billion, one hundred sixty-two million, six hundred eleven thousand, six hundred sixty-one".