66474350887 has 32 divisors (see below), whose sum is σ = 79818753024. Its totient is φ = 54127180800.

The previous prime is 66474350881. The next prime is 66474350903. The reversal of 66474350887 is 78805347466.

It is not a de Polignac number, because 66474350887 - 2³ = 66474350879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66474350881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18376503 + ... + 18380119.

It is an arithmetic number, because the mean of its divisors is an integer number (2494336032).

Almost surely, 2^66474350887 is an apocalyptic number.

66474350887 is a deficient number, since it is larger than the sum of its proper divisors (13344402137).

66474350887 is a wasteful number, since it uses less digits than its factorization.

66474350887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399.

The product of its (nonzero) digits is 27095040, while the sum is 58.

It can be divided in two parts, 6647 and 4350887, that added together give a palindrome (4357534).

The spelling of 66474350887 in words is "sixty-six billion, four hundred seventy-four million, three hundred fifty thousand, eight hundred eighty-seven".