66644266241 has 8 divisors (see below), whose sum is σ = 76166955264. Its totient is φ = 57122097120.

The previous prime is 66644266229. The next prime is 66644266243. The reversal of 66644266241 is 14266244666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66644266241 - 2⁶ = 66644266177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66644266243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200861 + ... + 416693.

It is an arithmetic number, because the mean of its divisors is an integer number (9520869408).

Almost surely, 2^66644266241 is an apocalyptic number.

It is an amenable number.

66644266241 is a deficient number, since it is larger than the sum of its proper divisors (9522689023).

66644266241 is a wasteful number, since it uses less digits than its factorization.

66644266241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259951.

The product of its digits is 1990656, while the sum is 47.

The spelling of 66644266241 in words is "sixty-six billion, six hundred forty-four million, two hundred sixty-six thousand, two hundred forty-one".