68521860660 has 96 divisors (see below), whose sum is σ = 214960056192. Its totient is φ = 16162398720.

The previous prime is 68521860653. The next prime is 68521860727. The reversal of 68521860660 is 6606812586.

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, 1378567 + ... + 1427406.

It is an arithmetic number, because the mean of its divisors is an integer number (2239167252).

Almost surely, 2^68521860660 is an apocalyptic number.

68521860660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68521860660 is an abundant number, since it is smaller than the sum of its proper divisors (146438195532).

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

68521860660 is a wasteful number, since it uses less digits than its factorization.

68521860660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806033 (or 2806031 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 68521860660 in words is "sixty-eight billion, five hundred twenty-one million, eight hundred sixty thousand, six hundred sixty".