66673436944 has 15 divisors (see below), whose sum is σ = 129181785253. Its totient is φ = 33336202048.

The previous prime is 66673436881. The next prime is 66673437013. The reversal of 66673436944 is 44963437666.

The square root of 66673436944 is 258212.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 463971600 + 66209465344 = 21540^2 + 257312^2 .

It is a super-4 number, since 4×66673436944⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1000572 + ... + 1065124.

Almost surely, 2^66673436944 is an apocalyptic number.

66673436944 is the 258212-nd square number.

It is an amenable number.

66673436944 is a deficient number, since it is larger than the sum of its proper divisors (62508348309).

66673436944 is an frugal number, since it uses more digits than its factorization.

66673436944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129114 (or 64555 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 58.

The spelling of 66673436944 in words is "sixty-six billion, six hundred seventy-three million, four hundred thirty-six thousand, nine hundred forty-four".