66687214349 has 16 divisors (see below), whose sum is σ = 77715905280. Its totient is φ = 56045001600.

The previous prime is 66687214303. The next prime is 66687214351. The reversal of 66687214349 is 94341278666.

It is not a de Polignac number, because 66687214349 - 2¹² = 66687210253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66687214294 and 66687214303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66687214249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385064 + ... + 530705.

It is an arithmetic number, because the mean of its divisors is an integer number (4857244080).

Almost surely, 2^66687214349 is an apocalyptic number.

It is an amenable number.

66687214349 is a deficient number, since it is larger than the sum of its proper divisors (11028690931).

66687214349 is a wasteful number, since it uses less digits than its factorization.

66687214349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915980.

The product of its digits is 10450944, while the sum is 56.

The spelling of 66687214349 in words is "sixty-six billion, six hundred eighty-seven million, two hundred fourteen thousand, three hundred forty-nine".