66050505501 has 16 divisors (see below), whose sum is σ = 94171025088. Its totient is φ = 41033120000.

The previous prime is 66050505463. The next prime is 66050505523. The reversal of 66050505501 is 10550505066.

It is a cyclic number.

It is not a de Polignac number, because 66050505501 - 2²⁵ = 66016951069 is a prime.

It is a super-2 number, since 2×66050505501² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66050505901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6406275 + ... + 6416576.

It is an arithmetic number, because the mean of its divisors is an integer number (5885689068).

Almost surely, 2^66050505501 is an apocalyptic number.

It is an amenable number.

66050505501 is a deficient number, since it is larger than the sum of its proper divisors (28120519587).

66050505501 is a wasteful number, since it uses less digits than its factorization.

66050505501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822972.

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 66050505501 in words is "sixty-six billion, fifty million, five hundred five thousand, five hundred one".