1166664445 has 12 divisors (see below), whose sum is σ = 1405531764. Its totient is φ = 929656320.

The previous prime is 1166664439. The next prime is 1166664449. The reversal of 1166664445 is 5444666611.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13586596 + 1153077849 = 3686^2 + 33957^2 .

It is not a de Polignac number, because 1166664445 - 2³ = 1166664437 is a prime.

It is a super-2 number, since 2×1166664445² = 2722211854454316050, 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 (1166664449) 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 11 ways as a sum of consecutive naturals, for example, 382125 + ... + 385165.

It is an arithmetic number, because the mean of its divisors is an integer number (117127647).

Almost surely, 2^1166664445 is an apocalyptic number.

It is an amenable number.

1166664445 is a deficient number, since it is larger than the sum of its proper divisors (238867319).

1166664445 is an frugal number, since it uses more digits than its factorization.

1166664445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600 (or 3323 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 1166664445 is about 34156.4700313132. The cubic root of 1166664445 is about 1052.7259313782.

The spelling of 1166664445 in words is "one billion, one hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-five".