66418481466 has 64 divisors (see below), whose sum is σ = 158927702400. Its totient is φ = 20483981568.

The previous prime is 66418481351. The next prime is 66418481471.

66418481466 is a `hidden beast` number, since 66 + 41 + 8 + 4 + 81 + 466 = 666.

66418481466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66418481466² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558985 + ... + 667308.

It is an arithmetic number, because the mean of its divisors is an integer number (2483245350).

Almost surely, 2^66418481466 is an apocalyptic number.

66418481466 is an abundant number, since it is smaller than the sum of its proper divisors (92509220934).

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

66418481466 is a wasteful number, since it uses less digits than its factorization.

66418481466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226380 (or 1226374 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 66418481466 in words is "sixty-six billion, four hundred eighteen million, four hundred eighty-one thousand, four hundred sixty-six".