66144035251244 has 12 divisors (see below), whose sum is σ = 118880495789664. Its totient is φ = 32178179311344.

The previous prime is 66144035251223. The next prime is 66144035251271. The reversal of 66144035251244 is 44215253044166.

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, 223459578404 + ... + 223459578699.

It is an arithmetic number, because the mean of its divisors is an integer number (9906707982472).

Almost surely, 2^{66144035251244} is an apocalyptic number.

It is an amenable number.

66144035251244 is a deficient number, since it is larger than the sum of its proper divisors (52736460538420).

66144035251244 is a wasteful number, since it uses less digits than its factorization.

66144035251244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446919157144 (or 446919157142 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 66144035251244 in words is "sixty-six trillion, one hundred forty-four billion, thirty-five million, two hundred fifty-one thousand, two hundred forty-four".