66965081711 has 8 divisors (see below), whose sum is σ = 73776112848. Its totient is φ = 60274600000.

The previous prime is 66965081707. The next prime is 66965081717. The reversal of 66965081711 is 11718056966.

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 66965081711 - 2² = 66965081707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66965081711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66965081717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30136190 + ... + 30138411.

It is an arithmetic number, because the mean of its divisors is an integer number (9222014106).

Almost surely, 2^66965081711 is an apocalyptic number.

66965081711 is a deficient number, since it is larger than the sum of its proper divisors (6811031137).

66965081711 is a wasteful number, since it uses less digits than its factorization.

66965081711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60274713.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 66965081711 in words is "sixty-six billion, nine hundred sixty-five million, eighty-one thousand, seven hundred eleven".