66080650 has 24 divisors (see below), whose sum is σ = 123256620. Its totient is φ = 26357760.

The previous prime is 66080639. The next prime is 66080659. The reversal of 66080650 is 5608066.

It can be written as a sum of positive squares in 6 ways, for example, as 25796241 + 40284409 = 5079^2 + 6347^2 .

It is not an unprimeable number, because it can be changed into a prime (66080659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18186 + ... + 21514.

Almost surely, 2^66080650 is an apocalyptic number.

66080650 is a deficient number, since it is larger than the sum of its proper divisors (57175970).

66080650 is a wasteful number, since it uses less digits than its factorization.

66080650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 66080650 is about 8129.0005535736. Note that the first 3 decimals coincide. The cubic root of 66080650 is about 404.2885441534.

The spelling of 66080650 in words is "sixty-six million, eighty thousand, six hundred fifty".