2066358521565 has 32 divisors (see below), whose sum is σ = 3956105207040. Its totient is φ = 1017284194368.

The previous prime is 2066358521543. The next prime is 2066358521581. The reversal of 2066358521565 is 5651258536602.

2066358521565 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 3 + 58 + 5 + 21 + 565 = 666.

It is not a de Polignac number, because 2066358521565 - 2⁶ = 2066358521501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 588704377 + ... + 588707886.

It is an arithmetic number, because the mean of its divisors is an integer number (123628287720).

Almost surely, 2^{2066358521565} is an apocalyptic number.

It is an amenable number.

2066358521565 is a deficient number, since it is larger than the sum of its proper divisors (1889746685475).

2066358521565 is a wasteful number, since it uses less digits than its factorization.

2066358521565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177412290 (or 1177412284 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 2066358521565 in words is "two trillion, sixty-six billion, three hundred fifty-eight million, five hundred twenty-one thousand, five hundred sixty-five".