66000687329 has 8 divisors (see below), whose sum is σ = 66686438280. Its totient is φ = 65315045376.

The previous prime is 66000687287. The next prime is 66000687331. The reversal of 66000687329 is 92378600066.

It can be written as a sum of positive squares in 4 ways, for example, as 66259600 + 65934427729 = 8140^2 + 256777^2 .

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 66000687329 - 2¹² = 66000683233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66000587329) 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, 1872977 + ... + 1907889.

It is an arithmetic number, because the mean of its divisors is an integer number (8335804785).

Almost surely, 2^66000687329 is an apocalyptic number.

It is an amenable number.

66000687329 is a deficient number, since it is larger than the sum of its proper divisors (685750951).

66000687329 is a wasteful number, since it uses less digits than its factorization.

66000687329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54499.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 66000687329 in words is "sixty-six billion, six hundred eighty-seven thousand, three hundred twenty-nine".