66396650 has 12 divisors (see below), whose sum is σ = 123497862. Its totient is φ = 26558640.

The previous prime is 66396643. The next prime is 66396719. The reversal of 66396650 is 5669366.

It can be written as a sum of positive squares in 3 ways, for example, as 39325441 + 27071209 = 6271^2 + 5203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66396598 and 66396607.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 663917 + ... + 664016.

Almost surely, 2^66396650 is an apocalyptic number.

66396650 is a deficient number, since it is larger than the sum of its proper divisors (57101212).

66396650 is a wasteful number, since it uses less digits than its factorization.

66396650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327945 (or 1327940 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 66396650 is about 8148.4139561021. The cubic root of 66396650 is about 404.9319603223.

The spelling of 66396650 in words is "sixty-six million, three hundred ninety-six thousand, six hundred fifty".