66495352887 has 18 divisors (see below), whose sum is σ = 99475091352. Its totient is φ = 42801601584.

The previous prime is 66495352879. The next prime is 66495352901. The reversal of 66495352887 is 78825359466.

It is a happy number.

66495352887 is a `hidden beast` number, since 66 + 49 + 5 + 3 + 528 + 8 + 7 = 666.

It is not a de Polignac number, because 66495352887 - 2³ = 66495352879 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66495352817) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4385043 + ... + 4400180.

It is an arithmetic number, because the mean of its divisors is an integer number (5526393964).

Almost surely, 2^66495352887 is an apocalyptic number.

66495352887 is a deficient number, since it is larger than the sum of its proper divisors (32979738465).

66495352887 is a wasteful number, since it uses less digits than its factorization.

66495352887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785287 (or 8785255 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 66495352887 in words is "sixty-six billion, four hundred ninety-five million, three hundred fifty-two thousand, eight hundred eighty-seven".