66413868141 has 16 divisors (see below), whose sum is σ = 89491103744. Its totient is φ = 43806541824.

The previous prime is 66413868137. The next prime is 66413868161. The reversal of 66413868141 is 14186831466.

It is a happy number.

It is not a de Polignac number, because 66413868141 - 2² = 66413868137 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 (66413868161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010805 + ... + 1074501.

It is an arithmetic number, because the mean of its divisors is an integer number (5593193984).

Almost surely, 2^66413868141 is an apocalyptic number.

It is an amenable number.

66413868141 is a deficient number, since it is larger than the sum of its proper divisors (23077235603).

66413868141 is a wasteful number, since it uses less digits than its factorization.

66413868141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67380.

The product of its digits is 663552, while the sum is 48.

The spelling of 66413868141 in words is "sixty-six billion, four hundred thirteen million, eight hundred sixty-eight thousand, one hundred forty-one".