66147137378 has 8 divisors (see below), whose sum is σ = 113395092672. Its totient is φ = 28348773156.

The previous prime is 66147137281. The next prime is 66147137383. The reversal of 66147137378 is 87373174166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2362397750 + ... + 2362397777.

It is an arithmetic number, because the mean of its divisors is an integer number (14174386584).

Almost surely, 2^66147137378 is an apocalyptic number.

66147137378 is a deficient number, since it is larger than the sum of its proper divisors (47247955294).

66147137378 is a wasteful number, since it uses less digits than its factorization.

66147137378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724795536.

The product of its digits is 3556224, while the sum is 53.

The spelling of 66147137378 in words is "sixty-six billion, one hundred forty-seven million, one hundred thirty-seven thousand, three hundred seventy-eight".