66677043441 has 4 divisors (see below), whose sum is σ = 88902724592. Its totient is φ = 44451362292.

The previous prime is 66677043421. The next prime is 66677043481. The reversal of 66677043441 is 14434077666.

66677043441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-66677043441 is a prime.

It is a super-2 number, since 2×66677043441² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66677043421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11112840571 + ... + 11112840576.

It is an arithmetic number, because the mean of its divisors is an integer number (22225681148).

Almost surely, 2^66677043441 is an apocalyptic number.

It is an amenable number.

66677043441 is a deficient number, since it is larger than the sum of its proper divisors (22225681151).

66677043441 is a wasteful number, since it uses less digits than its factorization.

66677043441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22225681150.

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 66677043441 in words is "sixty-six billion, six hundred seventy-seven million, forty-three thousand, four hundred forty-one".