66886850 has 24 divisors (see below), whose sum is σ = 124897140. Its totient is φ = 26649920.

The previous prime is 66886849. The next prime is 66886903. The reversal of 66886850 is 5868866.

It can be written as a sum of positive squares in 6 ways, for example, as 12967201 + 53919649 = 3601^2 + 7343^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66886795 and 66886804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10964 + ... + 15936.

Almost surely, 2^66886850 is an apocalyptic number.

66886850 is a deficient number, since it is larger than the sum of its proper divisors (58010290).

66886850 is a wasteful number, since it uses less digits than its factorization.

66886850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254 (or 5249 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 66886850 is about 8178.4381149459. The cubic root of 66886850 is about 405.9260423254.

The spelling of 66886850 in words is "sixty-six million, eight hundred eighty-six thousand, eight hundred fifty".