66410377557 has 8 divisors (see below), whose sum is σ = 89223103200. Its totient is φ = 43935618480.

The previous prime is 66410377529. The next prime is 66410377559. The reversal of 66410377557 is 75577301466.

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

It is not a de Polignac number, because 66410377557 - 2¹⁰ = 66410376533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66410377559) 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 7 ways as a sum of consecutive naturals, for example, 84491182 + ... + 84491967.

It is an arithmetic number, because the mean of its divisors is an integer number (11152887900).

Almost surely, 2^66410377557 is an apocalyptic number.

It is an amenable number.

66410377557 is a deficient number, since it is larger than the sum of its proper divisors (22812725643).

66410377557 is a wasteful number, since it uses less digits than its factorization.

66410377557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168983283.

The product of its (nonzero) digits is 3704400, while the sum is 51.

The spelling of 66410377557 in words is "sixty-six billion, four hundred ten million, three hundred seventy-seven thousand, five hundred fifty-seven".