66601651593 has 8 divisors (see below), whose sum is σ = 89681432256. Its totient is φ = 43961486000.

The previous prime is 66601651573. The next prime is 66601651603. The reversal of 66601651593 is 39515610666.

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 66601651593 - 2¹⁰ = 66601650569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66601651573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109903413 + ... + 109904018.

It is an arithmetic number, because the mean of its divisors is an integer number (11210179032).

Almost surely, 2^66601651593 is an apocalyptic number.

It is an amenable number.

66601651593 is a deficient number, since it is larger than the sum of its proper divisors (23079780663).

66601651593 is a wasteful number, since it uses less digits than its factorization.

66601651593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219807535.

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 66601651593 in words is "sixty-six billion, six hundred one million, six hundred fifty-one thousand, five hundred ninety-three".