661201230 has 32 divisors (see below), whose sum is σ = 1680230304. Its totient is φ = 165948416.

The previous prime is 661201169. The next prime is 661201241. The reversal of 661201230 is 32102166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 661201197 and 661201206.

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, 647727 + ... + 648746.

It is an arithmetic number, because the mean of its divisors is an integer number (52507197).

Almost surely, 2^661201230 is an apocalyptic number.

661201230 is an abundant number, since it is smaller than the sum of its proper divisors (1019029074).

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

661201230 is a wasteful number, since it uses less digits than its factorization.

661201230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296500.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 661201230 is about 25713.8334364987. The cubic root of 661201230 is about 871.1866618289.

Adding to 661201230 its reverse (32102166), we get a palindrome (693303396).

The spelling of 661201230 in words is "six hundred sixty-one million, two hundred one thousand, two hundred thirty".