1166784901 has 2 divisors, whose sum is σ = 1166784902. Its totient is φ = 1166784900.

The previous prime is 1166784859. The next prime is 1166784923. The reversal of 1166784901 is 1094876611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700872676 + 465912225 = 26474^2 + 21585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166784901 - 2²¹ = 1164687749 is a prime.

It is a super-2 number, since 2×1166784901² = 2722774010403159602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166784401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583392450 + 583392451.

It is an arithmetic number, because the mean of its divisors is an integer number (583392451).

Almost surely, 2^1166784901 is an apocalyptic number.

It is an amenable number.

1166784901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166784901 is an equidigital number, since it uses as much as digits as its factorization.

1166784901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1166784901 is about 34158.2332827680. The cubic root of 1166784901 is about 1052.7621608160.

The spelling of 1166784901 in words is "one billion, one hundred sixty-six million, seven hundred eighty-four thousand, nine hundred one".