660066176 has 128 divisors (see below), whose sum is σ = 1652693760. Its totient is φ = 255098880.

The previous prime is 660066161. The next prime is 660066179. The reversal of 660066176 is 671660066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660066179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902035 + ... + 1902381.

It is an arithmetic number, because the mean of its divisors is an integer number (12911670).

Almost surely, 2^660066176 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 660066176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826346880).

660066176 is an abundant number, since it is smaller than the sum of its proper divisors (992627584).

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

660066176 is a wasteful number, since it uses less digits than its factorization.

660066176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 660066176 is about 25691.7530737005. The cubic root of 660066176 is about 870.6878674957.

The spelling of 660066176 in words is "six hundred sixty million, sixty-six thousand, one hundred seventy-six".