66455199155466 has 144 divisors (see below), whose sum is σ = 168245151066720. Its totient is φ = 18889154856000.

The previous prime is 66455199155441. The next prime is 66455199155507.

It is a happy number.

66455199155466 is a `hidden beast` number, since 6 + 6 + 4 + 5 + 5 + 1 + 9 + 9 + 1 + 554 + 66 = 666.

66455199155466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66455199155394 and 66455199155403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3770400 + ... + 12129563.

It is an arithmetic number, because the mean of its divisors is an integer number (1168369104630).

Almost surely, 2^{66455199155466} is an apocalyptic number.

66455199155466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66455199155466 is an abundant number, since it is smaller than the sum of its proper divisors (101789951911254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66455199155466 is a wasteful number, since it uses less digits than its factorization.

66455199155466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900113 (or 15900099 counting only the distinct ones).

The product of its digits is 1049760000, while the sum is 72.

The spelling of 66455199155466 in words is "sixty-six trillion, four hundred fifty-five billion, one hundred ninety-nine million, one hundred fifty-five thousand, four hundred sixty-six".