680664750 has 64 divisors (see below), whose sum is σ = 1702748736. Its totient is φ = 181104000.

The previous prime is 680664749. The next prime is 680664767. The reversal of 680664750 is 57466086.

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 31 ways as a sum of consecutive naturals, for example, 495064 + ... + 496436.

It is an arithmetic number, because the mean of its divisors is an integer number (26605449).

Almost surely, 2^680664750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680664750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851374368).

680664750 is an abundant number, since it is smaller than the sum of its proper divisors (1022083986).

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

680664750 is a wasteful number, since it uses less digits than its factorization.

680664750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 680664750 is about 26089.5525067028. The cubic root of 680664750 is about 879.6523893950.

The spelling of 680664750 in words is "six hundred eighty million, six hundred sixty-four thousand, seven hundred fifty".