68266509 has 8 divisors (see below), whose sum is σ = 96376320. Its totient is φ = 42833856.

The previous prime is 68266463. The next prime is 68266511. The reversal of 68266509 is 90566286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68266509 - 2¹¹ = 68264461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68266559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669229 + ... + 669330.

It is an arithmetic number, because the mean of its divisors is an integer number (12047040).

Almost surely, 2^68266509 is an apocalyptic number.

It is an amenable number.

68266509 is a deficient number, since it is larger than the sum of its proper divisors (28109811).

68266509 is a wasteful number, since it uses less digits than its factorization.

68266509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338579.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 68266509 is about 8262.3549306478. The cubic root of 68266509 is about 408.6980493038.

The spelling of 68266509 in words is "sixty-eight million, two hundred sixty-six thousand, five hundred nine".