1166504641 has 2 divisors, whose sum is σ = 1166504642. Its totient is φ = 1166504640.

The previous prime is 1166504629. The next prime is 1166504681. The reversal of 1166504641 is 1464056611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877640625 + 288864016 = 29625^2 + 16996^2 .

It is an emirp because it is prime and its reverse (1464056611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1166504641 - 2¹¹ = 1166502593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166504597 and 1166504606.

It is not a weakly prime, because it can be changed into another prime (1166504621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583252320 + 583252321.

It is an arithmetic number, because the mean of its divisors is an integer number (583252321).

Almost surely, 2^1166504641 is an apocalyptic number.

It is an amenable number.

1166504641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166504641 is an equidigital number, since it uses as much as digits as its factorization.

1166504641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1166504641 is about 34154.1306579453. The cubic root of 1166504641 is about 1052.6778634306.

The spelling of 1166504641 in words is "one billion, one hundred sixty-six million, five hundred four thousand, six hundred forty-one".