610066665 has 24 divisors (see below), whose sum is σ = 1138792200. Its totient is φ = 300340224.

The previous prime is 610066663. The next prime is 610066703. The reversal of 610066665 is 566660016.

It can be written as a sum of positive squares in 4 ways, for example, as 58568409 + 551498256 = 7653^2 + 23484^2 .

It is not a de Polignac number, because 610066665 - 2¹ = 610066663 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (610066663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520840 + ... + 522009.

It is an arithmetic number, because the mean of its divisors is an integer number (47449675).

Almost surely, 2^610066665 is an apocalyptic number.

610066665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

610066665 is a deficient number, since it is larger than the sum of its proper divisors (528725535).

610066665 is a wasteful number, since it uses less digits than its factorization.

610066665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042873 (or 1042870 counting only the distinct ones).

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

The square root of 610066665 is about 24699.5276270620. The cubic root of 610066665 is about 848.1235028566.

The spelling of 610066665 in words is "six hundred ten million, sixty-six thousand, six hundred sixty-five".