665211030 has 32 divisors (see below), whose sum is σ = 1741644288. Its totient is φ = 161263200.

The previous prime is 665211013. The next prime is 665211059. The reversal of 665211030 is 30112566.

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, 1007566 + ... + 1008225.

It is an arithmetic number, because the mean of its divisors is an integer number (54426384).

Almost surely, 2^665211030 is an apocalyptic number.

665211030 is an abundant number, since it is smaller than the sum of its proper divisors (1076433258).

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

665211030 is a wasteful number, since it uses less digits than its factorization.

665211030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015812.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 665211030 is about 25791.6852880924. The cubic root of 665211030 is about 872.9441935436.

Adding to 665211030 its reverse (30112566), we get a palindrome (695323596).

The spelling of 665211030 in words is "six hundred sixty-five million, two hundred eleven thousand, thirty".