666146650536 has 128 divisors (see below), whose sum is σ = 1900842384000. Its totient is φ = 215999364096.

The previous prime is 666146650501. The next prime is 666146650579. The reversal of 666146650536 is 635056641666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 60230175 + ... + 60241233.

It is an arithmetic number, because the mean of its divisors is an integer number (14850331125).

Almost surely, 2^666146650536 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 666146650536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950421192000).

666146650536 is an abundant number, since it is smaller than the sum of its proper divisors (1234695733464).

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

666146650536 is a wasteful number, since it uses less digits than its factorization.

666146650536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18648 (or 18638 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 54.

The spelling of 666146650536 in words is "six hundred sixty-six billion, one hundred forty-six million, six hundred fifty thousand, five hundred thirty-six".