66416877489 has 32 divisors (see below), whose sum is σ = 96515215360. Its totient is φ = 40471358400.

The previous prime is 66416877463. The next prime is 66416877503. The reversal of 66416877489 is 98477861466.

It is not a de Polignac number, because 66416877489 - 2¹³ = 66416869297 is a prime.

It is a super-2 number, since 2×66416877489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66416877589) 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, 528099 + ... + 641655.

It is an arithmetic number, because the mean of its divisors is an integer number (3016100480).

Almost surely, 2^66416877489 is an apocalyptic number.

It is an amenable number.

66416877489 is a deficient number, since it is larger than the sum of its proper divisors (30098337871).

66416877489 is a wasteful number, since it uses less digits than its factorization.

66416877489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113941.

The product of its digits is 97542144, while the sum is 66.

The spelling of 66416877489 in words is "sixty-six billion, four hundred sixteen million, eight hundred seventy-seven thousand, four hundred eighty-nine".