610660 has 24 divisors (see below), whose sum is σ = 1350720. Its totient is φ = 231264.

The previous prime is 610651. The next prime is 610661. The reversal of 610660 is 66016.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (610661) by changing a digit.

610660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (56280).

2⁶¹⁰⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

610660 is an abundant number, since it is smaller than the sum of its proper divisors (740060).

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

610660 is a wasteful number, since it uses less digits than its factorization.

610660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 610660 is about 781.4473750676. The cubic root of 610660 is about 84.8398368067.

Adding to 610660 its reverse (66016), we get a palindrome (676676).

Subtracting from 610660 its reverse (66016), we obtain a square (544644 = 738²).

The spelling of 610660 in words is "six hundred ten thousand, six hundred sixty".