666560610 has 64 divisors (see below), whose sum is σ = 1795167360. Its totient is φ = 175982400.

The previous prime is 666560581. The next prime is 666560617. The reversal of 666560610 is 16065666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666560617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15049 + ... + 39491.

It is an arithmetic number, because the mean of its divisors is an integer number (28049490).

Almost surely, 2^666560610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666560610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897583680).

666560610 is an abundant number, since it is smaller than the sum of its proper divisors (1128606750).

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

666560610 is a wasteful number, since it uses less digits than its factorization.

666560610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24560 (or 24554 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 666560610 is about 25817.8351145095. The cubic root of 666560610 is about 873.5341377635.

The spelling of 666560610 in words is "six hundred sixty-six million, five hundred sixty thousand, six hundred ten".