610561660 has 24 divisors (see below), whose sum is σ = 1300241376. Its totient is φ = 240784320.

The previous prime is 610561619. The next prime is 610561663. The reversal of 610561660 is 66165016.

610561660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610561663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213567 + ... + 216406.

It is an arithmetic number, because the mean of its divisors is an integer number (54176724).

Almost surely, 2^610561660 is an apocalyptic number.

It is an amenable number.

610561660 is an abundant number, since it is smaller than the sum of its proper divisors (689679716).

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

610561660 is a wasteful number, since it uses less digits than its factorization.

610561660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430053 (or 430051 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 610561660 is about 24709.5459286487. The cubic root of 610561660 is about 848.3528239156.

The spelling of 610561660 in words is "six hundred ten million, five hundred sixty-one thousand, six hundred sixty".