66954087289 has 4 divisors (see below), whose sum is σ = 70477986640. Its totient is φ = 63430187940.

The previous prime is 66954087287. The next prime is 66954087307. The reversal of 66954087289 is 98278045966.

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 cyclic number.

It is not a de Polignac number, because 66954087289 - 2¹ = 66954087287 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 66954087289.

It is not an unprimeable number, because it can be changed into a prime (66954087287) 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, 1761949647 + ... + 1761949684.

It is an arithmetic number, because the mean of its divisors is an integer number (17619496660).

Almost surely, 2^66954087289 is an apocalyptic number.

It is an amenable number.

66954087289 is a deficient number, since it is larger than the sum of its proper divisors (3523899351).

66954087289 is a wasteful number, since it uses less digits than its factorization.

66954087289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523899350.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 66954087289 in words is "sixty-six billion, nine hundred fifty-four million, eighty-seven thousand, two hundred eighty-nine".