66260650 has 24 divisors (see below), whose sum is σ = 127497420. Its totient is φ = 25589760.

The previous prime is 66260639. The next prime is 66260651. The reversal of 66260650 is 5606266.

It can be written as a sum of positive squares in 6 ways, for example, as 20061441 + 46199209 = 4479^2 + 6797^2 .

It is not an unprimeable number, because it can be changed into a prime (66260651) 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, 21399 + ... + 24298.

Almost surely, 2^66260650 is an apocalyptic number.

66260650 is a deficient number, since it is larger than the sum of its proper divisors (61236770).

66260650 is a wasteful number, since it uses less digits than its factorization.

66260650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45738 (or 45733 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66260650 is about 8140.0644960590. The cubic root of 66260650 is about 404.6552978208.

The spelling of 66260650 in words is "sixty-six million, two hundred sixty thousand, six hundred fifty".