1166660645 has 8 divisors (see below), whose sum is σ = 1426408056. Its totient is φ = 915718336.

The previous prime is 1166660641. The next prime is 1166660687. The reversal of 1166660645 is 5460666611.

It can be written as a sum of positive squares in 4 ways, for example, as 337163044 + 829497601 = 18362^2 + 28801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166660645 - 2² = 1166660641 is a prime.

It is a super-2 number, since 2×1166660645² = 2722194121183632050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166660641) 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 7 ways as a sum of consecutive naturals, for example, 2200982 + ... + 2201511.

It is an arithmetic number, because the mean of its divisors is an integer number (178301007).

Almost surely, 2^1166660645 is an apocalyptic number.

It is an amenable number.

1166660645 is a deficient number, since it is larger than the sum of its proper divisors (259747411).

1166660645 is an equidigital number, since it uses as much as digits as its factorization.

1166660645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402551.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 1166660645 is about 34156.4144049108. The cubic root of 1166660645 is about 1052.7247884152.

The spelling of 1166660645 in words is "one billion, one hundred sixty-six million, six hundred sixty thousand, six hundred forty-five".