1332666561 has 16 divisors (see below), whose sum is σ = 1787209344. Its totient is φ = 883298304.

The previous prime is 1332666547. The next prime is 1332666641. The reversal of 1332666561 is 1656662331.

It is a happy number.

It is not a de Polignac number, because 1332666561 - 2⁶ = 1332666497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1332662561) 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, 502140 + ... + 504786.

It is an arithmetic number, because the mean of its divisors is an integer number (111700584).

Almost surely, 2^1332666561 is an apocalyptic number.

It is an amenable number.

1332666561 is a deficient number, since it is larger than the sum of its proper divisors (454542783).

1332666561 is a wasteful number, since it uses less digits than its factorization.

1332666561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560.

The product of its digits is 116640, while the sum is 39.

The square root of 1332666561 is about 36505.7058690830. The cubic root of 1332666561 is about 1100.4589162286.

The spelling of 1332666561 in words is "one billion, three hundred thirty-two million, six hundred sixty-six thousand, five hundred sixty-one".