66421466412466 has 48 divisors (see below), whose sum is σ = 110917121857920. Its totient is φ = 29804618844000.

The previous prime is 66421466412461. The next prime is 66421466412517.

66421466412466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66421466412466² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66421466412466.

It is not an unprimeable number, because it can be changed into a prime (66421466412461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120186825 + ... + 120738211.

It is an arithmetic number, because the mean of its divisors is an integer number (2310773372040).

Almost surely, 2^{66421466412466} is an apocalyptic number.

66421466412466 is a deficient number, since it is larger than the sum of its proper divisors (44495655445454).

66421466412466 is a wasteful number, since it uses less digits than its factorization.

66421466412466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557791 (or 557780 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 58.

The spelling of 66421466412466 in words is "sixty-six trillion, four hundred twenty-one billion, four hundred sixty-six million, four hundred twelve thousand, four hundred sixty-six".