66838541011 has 16 divisors (see below), whose sum is σ = 77219094528. Its totient is φ = 57176784000.

The previous prime is 66838540981. The next prime is 66838541017. The reversal of 66838541011 is 11014583866.

It is a cyclic number.

It is not a de Polignac number, because 66838541011 - 2⁷ = 66838540883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66838541017) 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, 996586 + ... + 1061536.

It is an arithmetic number, because the mean of its divisors is an integer number (4826193408).

Almost surely, 2^66838541011 is an apocalyptic number.

66838541011 is a deficient number, since it is larger than the sum of its proper divisors (10380553517).

66838541011 is a wasteful number, since it uses less digits than its factorization.

66838541011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70482.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 66838541011 in words is "sixty-six billion, eight hundred thirty-eight million, five hundred forty-one thousand, eleven".