610665 has 16 divisors (see below), whose sum is σ = 1066176. Its totient is φ = 296000.

The previous prime is 610661. The next prime is 610667. The reversal of 610665 is 566016.

It is not a de Polignac number, because 610665 - 2² = 610661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (610661) 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, 1686 + ... + 2015.

It is an arithmetic number, because the mean of its divisors is an integer number (66636).

2⁶¹⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

610665 is a deficient number, since it is larger than the sum of its proper divisors (455511).

610665 is a wasteful number, since it uses less digits than its factorization.

610665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 610665 is about 781.4505742528. The cubic root of 610665 is about 84.8400683584.

It can be divided in two parts, 610 and 665, that added together give a triangular number (1275 = T₅₀).

The spelling of 610665 in words is "six hundred ten thousand, six hundred sixty-five".