680440267 has 8 divisors (see below), whose sum is σ = 733020624. Its totient is φ = 627894048.

The previous prime is 680440261. The next prime is 680440273. The reversal of 680440267 is 762044086.

680440267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (680440261) and next prime (680440273).

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

It is a cyclic number.

It is not a de Polignac number, because 680440267 - 2²⁷ = 546222539 is a prime.

It is a deceptive number, since it divides R_680440266.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680440261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45648 + ... + 58690.

It is an arithmetic number, because the mean of its divisors is an integer number (91627578).

Almost surely, 2^680440267 is an apocalyptic number.

680440267 is the 13043-rd decagonal number.

680440267 is a deficient number, since it is larger than the sum of its proper divisors (52580357).

680440267 is a wasteful number, since it uses less digits than its factorization.

680440267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17069.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 680440267 is about 26085.2499892180. The cubic root of 680440267 is about 879.5556757439. Note that the first 3 decimals are identical.

The spelling of 680440267 in words is "six hundred eighty million, four hundred forty thousand, two hundred sixty-seven".