66723670244 has 36 divisors (see below), whose sum is σ = 148178545200. Its totient is φ = 25996234320.

The previous prime is 66723670217. The next prime is 66723670253. The reversal of 66723670244 is 44207632766.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15471794 + ... + 15476105.

It is an arithmetic number, because the mean of its divisors is an integer number (4116070700).

Almost surely, 2^66723670244 is an apocalyptic number.

It is an amenable number.

66723670244 is an abundant number, since it is smaller than the sum of its proper divisors (81454874956).

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

66723670244 is a wasteful number, since it uses less digits than its factorization.

66723670244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30947928 (or 30947919 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 47.

The spelling of 66723670244 in words is "sixty-six billion, seven hundred twenty-three million, six hundred seventy thousand, two hundred forty-four".