685112566 has 8 divisors (see below), whose sum is σ = 1039215960. Its totient is φ = 338707248.

The previous prime is 685112551. The next prime is 685112567. The reversal of 685112566 is 665211586.

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

It is a super-2 number, since 2×685112566² = 938758456182208712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685112567) 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 3 ways as a sum of consecutive naturals, for example, 1924296 + ... + 1924651.

It is an arithmetic number, because the mean of its divisors is an integer number (129901995).

Almost surely, 2^685112566 is an apocalyptic number.

685112566 is a deficient number, since it is larger than the sum of its proper divisors (354103394).

685112566 is a wasteful number, since it uses less digits than its factorization.

685112566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849038.

The product of its digits is 86400, while the sum is 40.

The square root of 685112566 is about 26174.6550311556. The cubic root of 685112566 is about 881.5642657902.

The spelling of 685112566 in words is "six hundred eighty-five million, one hundred twelve thousand, five hundred sixty-six".