1000066550121 has 6 divisors (see below), whose sum is σ = 1444540572410. Its totient is φ = 666711033408.

The previous prime is 1000066550107. The next prime is 1000066550141. The reversal of 1000066550121 is 1210556600001.

It is a happy number.

1000066550121 is a `hidden beast` number, since 1 + 0 + 0 + 0 + 0 + 6 + 655 + 0 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 890645187600 + 109421362521 = 943740^2 + 330789^2 .

It is not a de Polignac number, because 1000066550121 - 2³⁹ = 450310736233 is a prime.

It is a super-2 number, since 2×1000066550121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000066550141) 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 5 ways as a sum of consecutive naturals, for example, 55559252776 + ... + 55559252793.

Almost surely, 2^{1000066550121} is an apocalyptic number.

It is an amenable number.

1000066550121 is a deficient number, since it is larger than the sum of its proper divisors (444474022289).

1000066550121 is a wasteful number, since it uses less digits than its factorization.

1000066550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111118505575 (or 111118505572 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 1000066550121 in words is "one trillion, sixty-six million, five hundred fifty thousand, one hundred twenty-one".