610661660 has 48 divisors (see below), whose sum is σ = 1468346880. Its totient is φ = 208975680.

The previous prime is 610661659. The next prime is 610661669. The reversal of 610661660 is 66166016.

610661660 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 (610661669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76121 + ... + 83759.

It is an arithmetic number, because the mean of its divisors is an integer number (30590560).

Almost surely, 2^610661660 is an apocalyptic number.

It is an amenable number.

610661660 is an abundant number, since it is smaller than the sum of its proper divisors (857685220).

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

610661660 is a wasteful number, since it uses less digits than its factorization.

610661660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226 (or 8224 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 610661660 is about 24711.5693552635. The cubic root of 610661660 is about 848.3991368199.

It can be divided in two parts, 61066 and 1660, that added together give a palindrome (62726).

The spelling of 610661660 in words is "six hundred ten million, six hundred sixty-one thousand, six hundred sixty".