66471178366 has 16 divisors (see below), whose sum is σ = 100044921600. Its totient is φ = 33122913408.

The previous prime is 66471178343. The next prime is 66471178369. The reversal of 66471178366 is 66387117466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66471178369) 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, 5608675 + ... + 5620513.

It is an arithmetic number, because the mean of its divisors is an integer number (6252807600).

Almost surely, 2^66471178366 is an apocalyptic number.

66471178366 is a deficient number, since it is larger than the sum of its proper divisors (33573743234).

66471178366 is a wasteful number, since it uses less digits than its factorization.

66471178366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21123.

The product of its digits is 6096384, while the sum is 55.

The spelling of 66471178366 in words is "sixty-six billion, four hundred seventy-one million, one hundred seventy-eight thousand, three hundred sixty-six".