685067667 has 48 divisors (see below), whose sum is σ = 1030149120. Its totient is φ = 403401600.

The previous prime is 685067657. The next prime is 685067687. The reversal of 685067667 is 766760586.

It is a happy number.

685067667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685067667 - 2²⁸ = 416632211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685067657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1485817 + ... + 1486277.

It is an arithmetic number, because the mean of its divisors is an integer number (21461440).

Almost surely, 2^685067667 is an apocalyptic number.

685067667 is a deficient number, since it is larger than the sum of its proper divisors (345081453).

685067667 is a wasteful number, since it uses less digits than its factorization.

685067667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The square root of 685067667 is about 26173.7973362674. The cubic root of 685067667 is about 881.5450075347.

The spelling of 685067667 in words is "six hundred eighty-five million, sixty-seven thousand, six hundred sixty-seven".