666061560164 has 192 divisors, whose sum is σ = 1636296560640. Its totient is φ = 228673082880.

The previous prime is 666061560071. The next prime is 666061560169. The reversal of 666061560164 is 461065160666.

It is not an unprimeable number, because it can be changed into a prime (666061560169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48157202 + ... + 48171030.

It is an arithmetic number, because the mean of its divisors is an integer number (8522377920).

Almost surely, 2^666061560164 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 666061560164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818148280320).

666061560164 is an abundant number, since it is smaller than the sum of its proper divisors (970235000476).

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

666061560164 is a wasteful number, since it uses less digits than its factorization.

666061560164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14410 (or 14408 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 666061560164 in words is "six hundred sixty-six billion, sixty-one million, five hundred sixty thousand, one hundred sixty-four".