66041475557 has 8 divisors (see below), whose sum is σ = 66264971520. Its totient is φ = 65818312560.

The previous prime is 66041475473. The next prime is 66041475583. The reversal of 66041475557 is 75557414066.

66041475557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66041475557 - 2¹⁰ = 66041474533 is a prime.

It is a super-2 number, since 2×66041475557² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66041475257) 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, 317363 + ... + 482495.

It is an arithmetic number, because the mean of its divisors is an integer number (8283121440).

Almost surely, 2^66041475557 is an apocalyptic number.

It is an amenable number.

66041475557 is a deficient number, since it is larger than the sum of its proper divisors (223495963).

66041475557 is a wasteful number, since it uses less digits than its factorization.

66041475557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166483.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 66041475557 in words is "sixty-six billion, forty-one million, four hundred seventy-five thousand, five hundred fifty-seven".