66723105366 has 48 divisors (see below), whose sum is σ = 146602866384. Its totient is φ = 21928015872.

The previous prime is 66723105313. The next prime is 66723105377. The reversal of 66723105366 is 66350132766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4113925 + ... + 4130111.

It is an arithmetic number, because the mean of its divisors is an integer number (3054226383).

Almost surely, 2^66723105366 is an apocalyptic number.

66723105366 is an abundant number, since it is smaller than the sum of its proper divisors (79879761018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66723105366 is a wasteful number, since it uses less digits than its factorization.

66723105366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19405 (or 19402 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 66723105366 in words is "sixty-six billion, seven hundred twenty-three million, one hundred five thousand, three hundred sixty-six".