1325544666 has 32 divisors (see below), whose sum is σ = 2710326528. Its totient is φ = 431995200.

The previous prime is 1325544659. The next prime is 1325544667. The reversal of 1325544666 is 6664455231.

It is a super-3 number, since 3×1325544666³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1325544667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365076 + ... + 368688.

It is an arithmetic number, because the mean of its divisors is an integer number (84697704).

Almost surely, 2^1325544666 is an apocalyptic number.

1325544666 is an abundant number, since it is smaller than the sum of its proper divisors (1384781862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1325544666 is a wasteful number, since it uses less digits than its factorization.

1325544666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966.

The product of its digits is 518400, while the sum is 42.

The square root of 1325544666 is about 36408.0302405939. The cubic root of 1325544666 is about 1098.4950952540.

Adding to 1325544666 its reverse (6664455231), we get a palindrome (7989999897).

The spelling of 1325544666 in words is "one billion, three hundred twenty-five million, five hundred forty-four thousand, six hundred sixty-six".