666006630 has 32 divisors (see below), whose sum is σ = 1667913984. Its totient is φ = 169879776.

The previous prime is 666006589. The next prime is 666006631. The reversal of 666006630 is 36600666.

It is a junction number, because it is equal to n+sod(n) for n = 666006591 and 666006600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666006631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481924 + ... + 483303.

It is an arithmetic number, because the mean of its divisors is an integer number (52122312).

Almost surely, 2^666006630 is an apocalyptic number.

666006630 is an abundant number, since it is smaller than the sum of its proper divisors (1001907354).

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

666006630 is a wasteful number, since it uses less digits than its factorization.

666006630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965260.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 666006630 is about 25807.1042544490. The cubic root of 666006630 is about 873.2920719714.

The spelling of 666006630 in words is "six hundred sixty-six million, six thousand, six hundred thirty".