66910850 has 12 divisors (see below), whose sum is σ = 124454274. Its totient is φ = 26764320.

The previous prime is 66910819. The next prime is 66910873. The reversal of 66910850 is 5801966.

It can be written as a sum of positive squares in 3 ways, for example, as 38576521 + 28334329 = 6211^2 + 5323^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66910850.

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, 669059 + ... + 669158.

Almost surely, 2^66910850 is an apocalyptic number.

66910850 is a deficient number, since it is larger than the sum of its proper divisors (57543424).

66910850 is a wasteful number, since it uses less digits than its factorization.

66910850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338229 (or 1338224 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 66910850 is about 8179.9052561750. The cubic root of 66910850 is about 405.9745872937.

The spelling of 66910850 in words is "sixty-six million, nine hundred ten thousand, eight hundred fifty".