630206021660 has 24 divisors (see below), whose sum is σ = 1359201096960. Its totient is φ = 245269370304.

The previous prime is 630206021647. The next prime is 630206021663. The reversal of 630206021660 is 66120602036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630206021663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425814140 + ... + 425815619.

It is an arithmetic number, because the mean of its divisors is an integer number (56633379040).

Almost surely, 2^630206021660 is an apocalyptic number.

It is an amenable number.

630206021660 is an abundant number, since it is smaller than the sum of its proper divisors (728995075300).

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

630206021660 is a wasteful number, since it uses less digits than its factorization.

630206021660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851629805 (or 851629803 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 630206021660 its reverse (66120602036), we get a palindrome (696326623696).

The spelling of 630206021660 in words is "six hundred thirty billion, two hundred six million, twenty-one thousand, six hundred sixty".