66854944 has 24 divisors (see below), whose sum is σ = 141746220. Its totient is φ = 30855936.

The previous prime is 66854927. The next prime is 66854971. The reversal of 66854944 is 44945866.

It can be written as a sum of positive squares in 2 ways, for example, as 61152400 + 5702544 = 7820^2 + 2388^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66854894 and 66854903.

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, 79939 + ... + 80770.

Almost surely, 2^66854944 is an apocalyptic number.

It is an amenable number.

66854944 is an abundant number, since it is smaller than the sum of its proper divisors (74891276).

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

66854944 is a wasteful number, since it uses less digits than its factorization.

66854944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160732 (or 160724 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 66854944 is about 8176.4872653237. The cubic root of 66854944 is about 405.8614878517.

The spelling of 66854944 in words is "sixty-six million, eight hundred fifty-four thousand, nine hundred forty-four".