66686388322 has 16 divisors (see below), whose sum is σ = 102564911232. Its totient is φ = 32503738000.

The previous prime is 66686388317. The next prime is 66686388331. The reversal of 66686388322 is 22388368666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389613 + ... + 1436800.

It is an arithmetic number, because the mean of its divisors is an integer number (6410306952).

Almost surely, 2^66686388322 is an apocalyptic number.

66686388322 is a deficient number, since it is larger than the sum of its proper divisors (35878522910).

66686388322 is a wasteful number, since it uses less digits than its factorization.

66686388322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826713.

The product of its digits is 23887872, while the sum is 58.

The spelling of 66686388322 in words is "sixty-six billion, six hundred eighty-six million, three hundred eighty-eight thousand, three hundred twenty-two".