66501066506 has 8 divisors (see below), whose sum is σ = 114001828320. Its totient is φ = 28500457068.

The previous prime is 66501066487. The next prime is 66501066509. The reversal of 66501066506 is 60566010566.

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

It is not an unprimeable number, because it can be changed into a prime (66501066509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2375038076 + ... + 2375038103.

It is an arithmetic number, because the mean of its divisors is an integer number (14250228540).

Almost surely, 2^66501066506 is an apocalyptic number.

66501066506 is a deficient number, since it is larger than the sum of its proper divisors (47500761814).

66501066506 is a wasteful number, since it uses less digits than its factorization.

66501066506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750076188.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 66501066506 in words is "sixty-six billion, five hundred one million, sixty-six thousand, five hundred six".