66541367444 has 48 divisors (see below), whose sum is σ = 121608055296. Its totient is φ = 31823347200.

The previous prime is 66541367443. The next prime is 66541367461. The reversal of 66541367444 is 44476314566.

It is a junction number, because it is equal to n+sod(n) for n = 66541367392 and 66541367401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66541367443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3949799 + ... + 3966609.

It is an arithmetic number, because the mean of its divisors is an integer number (2533501152).

Almost surely, 2^66541367444 is an apocalyptic number.

It is an amenable number.

66541367444 is a deficient number, since it is larger than the sum of its proper divisors (55066687852).

66541367444 is a wasteful number, since it uses less digits than its factorization.

66541367444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17216 (or 17214 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 50.

The spelling of 66541367444 in words is "sixty-six billion, five hundred forty-one million, three hundred sixty-seven thousand, four hundred forty-four".