666041600 has 108 divisors (see below), whose sum is σ = 1884191904. Its totient is φ = 228341760.

The previous prime is 666041543. The next prime is 666041609. The reversal of 666041600 is 6140666.

666041600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666041600² = 887222825861120000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666041609) 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, 37367 + ... + 52233.

Almost surely, 2^666041600 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 666041600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942095952).

666041600 is an abundant number, since it is smaller than the sum of its proper divisors (1218150304).

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

666041600 is a wasteful number, since it uses less digits than its factorization.

666041600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14900 (or 14881 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 666041600 is about 25807.7817721710. The cubic root of 666041600 is about 873.3073563485.

The spelling of 666041600 in words is "six hundred sixty-six million, forty-one thousand, six hundred".