666631030 has 32 divisors (see below), whose sum is σ = 1368257184. Its totient is φ = 231661056.

The previous prime is 666631019. The next prime is 666631051. The reversal of 666631030 is 30136666.

It is a junction number, because it is equal to n+sod(n) for n = 666630983 and 666631001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148612 + ... + 153031.

It is an arithmetic number, because the mean of its divisors is an integer number (42758037).

Almost surely, 2^666631030 is an apocalyptic number.

666631030 is an abundant number, since it is smaller than the sum of its proper divisors (701626154).

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

666631030 is a wasteful number, since it uses less digits than its factorization.

666631030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301680.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 666631030 is about 25819.1988644110. The cubic root of 666631030 is about 873.5648987110.

Adding to 666631030 its reverse (30136666), we get a palindrome (696767696).

The spelling of 666631030 in words is "six hundred sixty-six million, six hundred thirty-one thousand, thirty".