66505200051 has 8 divisors (see below), whose sum is σ = 92528974080. Its totient is φ = 42409113032.

The previous prime is 66505199989. The next prime is 66505200059. The reversal of 66505200051 is 15000250566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66505200051 - 2¹⁷ = 66505068979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66505199991 and 66505200018.

It is not an unprimeable number, because it can be changed into a prime (66505200059) 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 7 ways as a sum of consecutive naturals, for example, 481921671 + ... + 481921808.

It is an arithmetic number, because the mean of its divisors is an integer number (11566121760).

Almost surely, 2^66505200051 is an apocalyptic number.

66505200051 is a deficient number, since it is larger than the sum of its proper divisors (26023774029).

66505200051 is a wasteful number, since it uses less digits than its factorization.

66505200051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963843505.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 66505200051 in words is "sixty-six billion, five hundred five million, two hundred thousand, fifty-one".