1166720033 has 4 divisors (see below), whose sum is σ = 1166791728. Its totient is φ = 1166648340.

The previous prime is 1166720029. The next prime is 1166720053. The reversal of 1166720033 is 3300276611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1166720033 - 2² = 1166720029 is a prime.

It is a super-2 number, since 2×1166720033² = 2722471270807042178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166719978 and 1166720005.

It is not an unprimeable number, because it can be changed into a prime (1166720053) 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 in 3 ways as a sum of consecutive naturals, for example, 1610 + ... + 48332.

It is an arithmetic number, because the mean of its divisors is an integer number (291697932).

Almost surely, 2^1166720033 is an apocalyptic number.

It is an amenable number.

1166720033 is a deficient number, since it is larger than the sum of its proper divisors (71695).

1166720033 is an equidigital number, since it uses as much as digits as its factorization.

1166720033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71694.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 1166720033 is about 34157.2837473942. The cubic root of 1166720033 is about 1052.7426508385.

Adding to 1166720033 its reverse (3300276611), we get a palindrome (4466996644).

The spelling of 1166720033 in words is "one billion, one hundred sixty-six million, seven hundred twenty thousand, thirty-three".