661326060600000 has 672 divisors, whose sum is σ = 2475916001858880. Its totient is φ = 173026114560000.

The previous prime is 661326060599987. The next prime is 661326060600011. The reversal of 661326060600000 is 6060623166.

661326060600000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 285044644 + ... + 287355356.

It is an arithmetic number, because the mean of its divisors is an integer number (3684398812290).

Almost surely, 2^{661326060600000} is an apocalyptic number.

661326060600000 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 661326060600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237958000929440).

661326060600000 is an abundant number, since it is smaller than the sum of its proper divisors (1814589941258880).

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

661326060600000 is an equidigital number, since it uses as much as digits as its factorization.

661326060600000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310812 (or 2310776 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 661326060600000 in words is "six hundred sixty-one trillion, three hundred twenty-six billion, sixty million, six hundred thousand".