685666080 has 384 divisors, whose sum is σ = 2682408960. Its totient is φ = 162155520.

The previous prime is 685666063. The next prime is 685666103. The reversal of 685666080 is 80666586.

685666080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2233287 + ... + 2233593.

It is an arithmetic number, because the mean of its divisors is an integer number (6985440).

Almost surely, 2^685666080 is an apocalyptic number.

685666080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685666080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341204480).

685666080 is an abundant number, since it is smaller than the sum of its proper divisors (1996742880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685666080 is a wasteful number, since it uses less digits than its factorization.

685666080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 685666080 is about 26185.2263690807. The cubic root of 685666080 is about 881.8016120971.

The spelling of 685666080 in words is "six hundred eighty-five million, six hundred sixty-six thousand, eighty".