666466200 has 144 divisors (see below), whose sum is σ = 2298937680. Its totient is φ = 172903680.

The previous prime is 666466187. The next prime is 666466201. The reversal of 666466200 is 2664666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666466201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61597 + ... + 71603.

It is an arithmetic number, because the mean of its divisors is an integer number (15964845).

Almost surely, 2^666466200 is an apocalyptic number.

666466200 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 666466200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149468840).

666466200 is an abundant number, since it is smaller than the sum of its proper divisors (1632471480).

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

666466200 is a wasteful number, since it uses less digits than its factorization.

666466200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066 (or 10054 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 666466200 is about 25816.0066625340. The cubic root of 666466200 is about 873.4928940763.

It can be divided in two parts, 666466 and 200, that added together give a palindrome (666666).

The spelling of 666466200 in words is "six hundred sixty-six million, four hundred sixty-six thousand, two hundred".