685066523 has 16 divisors (see below), whose sum is σ = 729872640. Its totient is φ = 641603424.

The previous prime is 685066513. The next prime is 685066549. The reversal of 685066523 is 325660586.

It is a cyclic number.

It is not a de Polignac number, because 685066523 - 2⁸ = 685066267 is a prime.

It is a super-2 number, since 2×685066523² = 938632281870619058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685066513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396740 + ... + 398462.

It is an arithmetic number, because the mean of its divisors is an integer number (45617040).

Almost surely, 2^685066523 is an apocalyptic number.

685066523 is a deficient number, since it is larger than the sum of its proper divisors (44806117).

685066523 is a wasteful number, since it uses less digits than its factorization.

685066523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 685066523 is about 26173.7754823411. The cubic root of 685066523 is about 881.5445168347.

The spelling of 685066523 in words is "six hundred eighty-five million, sixty-six thousand, five hundred twenty-three".