665620230 has 64 divisors (see below), whose sum is σ = 1818505728. Its totient is φ = 154344960.

The previous prime is 665620229. The next prime is 665620273. The reversal of 665620230 is 32026566.

665620230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36259 + ... + 51438.

It is an arithmetic number, because the mean of its divisors is an integer number (28414152).

Almost surely, 2^665620230 is an apocalyptic number.

665620230 is an abundant number, since it is smaller than the sum of its proper divisors (1152885498).

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

665620230 is a wasteful number, since it uses less digits than its factorization.

665620230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87741.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 665620230 is about 25799.6168576202. The cubic root of 665620230 is about 873.1231520636.

Adding to 665620230 its reverse (32026566), we get a palindrome (697646796).

The spelling of 665620230 in words is "six hundred sixty-five million, six hundred twenty thousand, two hundred thirty".