685335061 has 4 divisors (see below), whose sum is σ = 696570124. Its totient is φ = 674100000.

The previous prime is 685335041. The next prime is 685335089. The reversal of 685335061 is 160533586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8814961 + 676520100 = 2969^2 + 26010^2 .

It is a cyclic number.

It is not a de Polignac number, because 685335061 - 2¹¹ = 685333013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685335061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685335031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5617440 + ... + 5617561.

It is an arithmetic number, because the mean of its divisors is an integer number (174142531).

Almost surely, 2^685335061 is an apocalyptic number.

685335061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

685335061 is a deficient number, since it is larger than the sum of its proper divisors (11235063).

685335061 is a wasteful number, since it uses less digits than its factorization.

685335061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235062.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 685335061 is about 26178.9048854225. The cubic root of 685335061 is about 881.6596868066.

It can be divided in two parts, 6853 and 35061, that added together give a palindrome (41914).

The spelling of 685335061 in words is "six hundred eighty-five million, three hundred thirty-five thousand, sixty-one".