660066000 has 320 divisors, whose sum is σ = 2370491136. Its totient is φ = 156672000.

The previous prime is 660065993. The next prime is 660066037. The reversal of 660066000 is 660066.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4817932 + ... + 4818068.

Almost surely, 2^660066000 is an apocalyptic number.

660066000 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 660066000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185245568).

660066000 is an abundant number, since it is smaller than the sum of its proper divisors (1710425136).

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

660066000 is a wasteful number, since it uses less digits than its factorization.

660066000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 660066000 is about 25691.7496484766. The cubic root of 660066000 is about 870.6877901090.

660066000 divided by its reverse (660066) gives a cube (1000 = 10³).

It can be divided in two parts, 6 and 60066000, that added together give a palindrome (60066006).

The spelling of 660066000 in words is "six hundred sixty million, sixty-six thousand".