1166309801 has 2 divisors, whose sum is σ = 1166309802. Its totient is φ = 1166309800.

The previous prime is 1166309789. The next prime is 1166309839. The reversal of 1166309801 is 1089036611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1054690576 + 111619225 = 32476^2 + 10565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166309801 - 2¹⁴ = 1166293417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1166305801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583154900 + 583154901.

It is an arithmetic number, because the mean of its divisors is an integer number (583154901).

Almost surely, 2^1166309801 is an apocalyptic number.

It is an amenable number.

1166309801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166309801 is an equidigital number, since it uses as much as digits as its factorization.

1166309801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1166309801 is about 34151.2781752016. The cubic root of 1166309801 is about 1052.6192509547.

The spelling of 1166309801 in words is "one billion, one hundred sixty-six million, three hundred nine thousand, eight hundred one".