66363305121 has 6 divisors (see below), whose sum is σ = 95858107410. Its totient is φ = 44242203408.

The previous prime is 66363305053. The next prime is 66363305143. The reversal of 66363305121 is 12150336366.

66363305121 is a `hidden beast` number, since 6 + 6 + 3 + 633 + 0 + 5 + 12 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35760701025 + 30602604096 = 189105^2 + 174936^2 .

It is not a de Polignac number, because 66363305121 - 2¹⁰ = 66363304097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66363305321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3686850276 + ... + 3686850293.

It is an arithmetic number, because the mean of its divisors is an integer number (15976351235).

Almost surely, 2^66363305121 is an apocalyptic number.

It is an amenable number.

66363305121 is a deficient number, since it is larger than the sum of its proper divisors (29494802289).

66363305121 is a wasteful number, since it uses less digits than its factorization.

66363305121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373700575 (or 7373700572 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 66363305121 in words is "sixty-six billion, three hundred sixty-three million, three hundred five thousand, one hundred twenty-one".