680653692 has 72 divisors (see below), whose sum is σ = 1800345456. Its totient is φ = 224840448.

The previous prime is 680653681. The next prime is 680653709. The reversal of 680653692 is 296356086.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106738 + ... + 112934.

It is an arithmetic number, because the mean of its divisors is an integer number (25004798).

Almost surely, 2^680653692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680653692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900172728).

680653692 is an abundant number, since it is smaller than the sum of its proper divisors (1119691764).

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

680653692 is a wasteful number, since it uses less digits than its factorization.

680653692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329 (or 6315 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 680653692 is about 26089.3405819312. The cubic root of 680653692 is about 879.6476257926.

The spelling of 680653692 in words is "six hundred eighty million, six hundred fifty-three thousand, six hundred ninety-two".