1166782501 has 2 divisors, whose sum is σ = 1166782502. Its totient is φ = 1166782500.

The previous prime is 1166782489. The next prime is 1166782523. The reversal of 1166782501 is 1052876611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652853601 + 513928900 = 25551^2 + 22670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166782501 - 2⁷ = 1166782373 is a prime.

It is a super-2 number, since 2×1166782501² = 2722762809279630002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166702501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583391250 + 583391251.

It is an arithmetic number, because the mean of its divisors is an integer number (583391251).

Almost surely, 2^1166782501 is an apocalyptic number.

It is an amenable number.

1166782501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166782501 is an equidigital number, since it uses as much as digits as its factorization.

1166782501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1166782501 is about 34158.1981521274. The cubic root of 1166782501 is about 1052.7614389946.

The spelling of 1166782501 in words is "one billion, one hundred sixty-six million, seven hundred eighty-two thousand, five hundred one".