610965665 has 16 divisors (see below), whose sum is σ = 742360896. Its totient is φ = 482664000.

The previous prime is 610965647. The next prime is 610965679. The reversal of 610965665 is 566569016.

It is not a de Polignac number, because 610965665 - 2²⁶ = 543856801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222350 + ... + 225080.

It is an arithmetic number, because the mean of its divisors is an integer number (46397556).

Almost surely, 2^610965665 is an apocalyptic number.

It is an amenable number.

610965665 is a deficient number, since it is larger than the sum of its proper divisors (131395231).

610965665 is a wasteful number, since it uses less digits than its factorization.

610965665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 610965665 is about 24717.7196561495. The cubic root of 610965665 is about 848.5398993232.

The spelling of 610965665 in words is "six hundred ten million, nine hundred sixty-five thousand, six hundred sixty-five".