685358775 has 18 divisors (see below), whose sum is σ = 1227554120. Its totient is φ = 365524560.

The previous prime is 685358771. The next prime is 685358777. The reversal of 685358775 is 577853586.

685358775 is a `hidden beast` number, since 6 + 8 + 53 + 587 + 7 + 5 = 666.

It is not a de Polignac number, because 685358775 - 2² = 685358771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685358771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1522795 + ... + 1523244.

Almost surely, 2^685358775 is an apocalyptic number.

685358775 is a deficient number, since it is larger than the sum of its proper divisors (542195345).

685358775 is a wasteful number, since it uses less digits than its factorization.

685358775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046055 (or 3046047 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 54.

The square root of 685358775 is about 26179.3578034298. The cubic root of 685358775 is about 881.6698557677.

The spelling of 685358775 in words is "six hundred eighty-five million, three hundred fifty-eight thousand, seven hundred seventy-five".