680406081 has 8 divisors (see below), whose sum is σ = 907328640. Its totient is φ = 453543792.

The previous prime is 680406053. The next prime is 680406119. The reversal of 680406081 is 180604086.

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

It is not a de Polignac number, because 680406081 - 2⁷ = 680405953 is a prime.

It is a super-2 number, since 2×680406081² = 925904870123557122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (680406281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36171 + ... + 51663.

It is an arithmetic number, because the mean of its divisors is an integer number (113416080).

Almost surely, 2^680406081 is an apocalyptic number.

It is an amenable number.

680406081 is a deficient number, since it is larger than the sum of its proper divisors (226922559).

680406081 is a wasteful number, since it uses less digits than its factorization.

680406081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30135.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 680406081 is about 26084.5947064546. The cubic root of 680406081 is about 879.5409455781.

The spelling of 680406081 in words is "six hundred eighty million, four hundred six thousand, eighty-one".