66909540941 has 8 divisors (see below), whose sum is σ = 66961367424. Its totient is φ = 66857739840.

The previous prime is 66909540917. The next prime is 66909540947. The reversal of 66909540941 is 14904590966.

66909540941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66909540941 - 2¹⁸ = 66909278797 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 (66909540947) 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, 12783461 + ... + 12788693.

It is an arithmetic number, because the mean of its divisors is an integer number (8370170928).

Almost surely, 2^66909540941 is an apocalyptic number.

It is an amenable number.

66909540941 is a deficient number, since it is larger than the sum of its proper divisors (51826483).

66909540941 is a wasteful number, since it uses less digits than its factorization.

66909540941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12691.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 66909540941 in words is "sixty-six billion, nine hundred nine million, five hundred forty thousand, nine hundred forty-one".