680664751 has 8 divisors (see below), whose sum is σ = 776142864. Its totient is φ = 591346560.

The previous prime is 680664749. The next prime is 680664767. The reversal of 680664751 is 157466086.

It is a happy number.

680664751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 680664751 - 2¹ = 680664749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680664698 and 680664707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680664701) 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, 1539745 + ... + 1540186.

It is an arithmetic number, because the mean of its divisors is an integer number (97017858).

Almost surely, 2^680664751 is an apocalyptic number.

680664751 is a deficient number, since it is larger than the sum of its proper divisors (95478113).

680664751 is a wasteful number, since it uses less digits than its factorization.

680664751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079961.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 680664751 is about 26089.5525258675. The cubic root of 680664751 is about 879.6523898258.

The spelling of 680664751 in words is "six hundred eighty million, six hundred sixty-four thousand, seven hundred fifty-one".