683757221664 has 96 divisors (see below), whose sum is σ = 1958748051456. Its totient is φ = 207123390720.

The previous prime is 683757221657. The next prime is 683757221681. The reversal of 683757221664 is 466122757386.

It is a happy number.

683757221664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2804949 + ... + 3038955.

It is an arithmetic number, because the mean of its divisors is an integer number (20403625536).

Almost surely, 2^683757221664 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 683757221664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (979374025728).

683757221664 is an abundant number, since it is smaller than the sum of its proper divisors (1274990829792).

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

683757221664 is a wasteful number, since it uses less digits than its factorization.

683757221664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236798 (or 236790 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 57.

It can be divided in two parts, 68375722 and 1664, that added together give a palindrome (68377386).

The spelling of 683757221664 in words is "six hundred eighty-three billion, seven hundred fifty-seven million, two hundred twenty-one thousand, six hundred sixty-four".