68666650 has 48 divisors (see below), whose sum is σ = 138663000. Its totient is φ = 25148160.

The previous prime is 68666639. The next prime is 68666651. The reversal of 68666650 is 5666686.

It can be written as a sum of positive squares in 12 ways, for example, as 8898289 + 59768361 = 2983^2 + 7731^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68666597 and 68666606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68666651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96496 + ... + 97204.

Almost surely, 2^68666650 is an apocalyptic number.

68666650 is an abundant number, since it is smaller than the sum of its proper divisors (69996350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68666650 is a wasteful number, since it uses less digits than its factorization.

68666650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 68666650 is about 8286.5342574565. The cubic root of 68666650 is about 409.4950157994.

The spelling of 68666650 in words is "sixty-eight million, six hundred sixty-six thousand, six hundred fifty".