66672944 has 40 divisors (see below), whose sum is σ = 141053472. Its totient is φ = 30343680.

The previous prime is 66672941. The next prime is 66672961. The reversal of 66672944 is 44927666.

It is a junction number, because it is equal to n+sod(n) for n = 66672895 and 66672904.

It is not an unprimeable number, because it can be changed into a prime (66672941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12989 + ... + 17379.

Almost surely, 2^66672944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66672944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70526736).

66672944 is an abundant number, since it is smaller than the sum of its proper divisors (74380528).

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

66672944 is a wasteful number, since it uses less digits than its factorization.

66672944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485 (or 4479 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 66672944 is about 8165.3502068191. The cubic root of 66672944 is about 405.4928593086.

The spelling of 66672944 in words is "sixty-six million, six hundred seventy-two thousand, nine hundred forty-four".