681220260 has 192 divisors, whose sum is σ = 2564835840. Its totient is φ = 146534400.

The previous prime is 681220201. The next prime is 681220297. The reversal of 681220260 is 62022186.

It is a super-2 number, since 2×681220260² = 928122085268935200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58960 + ... + 69560.

It is an arithmetic number, because the mean of its divisors is an integer number (13358520).

Almost surely, 2^681220260 is an apocalyptic number.

681220260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681220260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282417920).

681220260 is an abundant number, since it is smaller than the sum of its proper divisors (1883615580).

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

681220260 is a wasteful number, since it uses less digits than its factorization.

681220260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643 (or 10635 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 681220260 is about 26100.1965509841. The cubic root of 681220260 is about 879.8916274946.

It can be divided in two parts, 6812 and 20260, that added together give a palindrome (27072).

The spelling of 681220260 in words is "six hundred eighty-one million, two hundred twenty thousand, two hundred sixty".