1553782065066 has 48 divisors (see below), whose sum is σ = 4197229478208. Its totient is φ = 403579756800.

The previous prime is 1553782065049. The next prime is 1553782065067. The reversal of 1553782065066 is 6605602873551.

It is a happy number.

1553782065066 is a `hidden beast` number, since 1 + 5 + 5 + 378 + 206 + 5 + 0 + 66 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1553782065067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560526055 + ... + 560528826.

It is an arithmetic number, because the mean of its divisors is an integer number (87442280796).

Almost surely, 2^{1553782065066} is an apocalyptic number.

1553782065066 is an abundant number, since it is smaller than the sum of its proper divisors (2643447413142).

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

1553782065066 is a wasteful number, since it uses less digits than its factorization.

1553782065066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121054907 (or 1121054904 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 1553782065066 in words is "one trillion, five hundred fifty-three billion, seven hundred eighty-two million, sixty-five thousand, sixty-six".