666275000 has 96 divisors (see below), whose sum is σ = 1617084000. Its totient is φ = 257040000.

The previous prime is 666274997. The next prime is 666275003. The reversal of 666275000 is 572666.

It is an interprime number because it is at equal distance from previous prime (666274997) and next prime (666275003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666275003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724541 + ... + 725459.

It is an arithmetic number, because the mean of its divisors is an integer number (16844625).

Almost surely, 2^666275000 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 666275000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808542000).

666275000 is an abundant number, since it is smaller than the sum of its proper divisors (950809000).

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

666275000 is an equidigital number, since it uses as much as digits as its factorization.

666275000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 666275000 is about 25812.3032680154. The cubic root of 666275000 is about 873.4093550486.

The spelling of 666275000 in words is "six hundred sixty-six million, two hundred seventy-five thousand".