666956200 has 48 divisors (see below), whose sum is σ = 1554900480. Its totient is φ = 266055360.

The previous prime is 666956197. The next prime is 666956201. The reversal of 666956200 is 2659666.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (666956201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72247 + ... + 80953.

It is an arithmetic number, because the mean of its divisors is an integer number (32393760).

Almost surely, 2^666956200 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 666956200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777450240).

666956200 is an abundant number, since it is smaller than the sum of its proper divisors (887944280).

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

666956200 is a wasteful number, since it uses less digits than its factorization.

666956200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106 (or 9097 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 666956200 is about 25825.4951549820. The cubic root of 666956200 is about 873.7069117647.

The spelling of 666956200 in words is "six hundred sixty-six million, nine hundred fifty-six thousand, two hundred".