1166647181842 has 16 divisors (see below), whose sum is σ = 1762181227800. Its totient is φ = 579255509248.

The previous prime is 1166647181839. The next prime is 1166647181849. The reversal of 1166647181842 is 2481817466611.

It can be written as a sum of positive squares in 4 ways, for example, as 481773421801 + 684873760041 = 694099^2 + 827571^2 .

It is a super-2 number, since 2×1166647181842² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166647181849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615978 + ... + 1647034.

Almost surely, 2^{1166647181842} is an apocalyptic number.

1166647181842 is a deficient number, since it is larger than the sum of its proper divisors (595534045958).

1166647181842 is a wasteful number, since it uses less digits than its factorization.

1166647181842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035005.

The product of its digits is 3096576, while the sum is 55.

The spelling of 1166647181842 in words is "one trillion, one hundred sixty-six billion, six hundred forty-seven million, one hundred eighty-one thousand, eight hundred forty-two".