606610661605 has 16 divisors (see below), whose sum is σ = 783949566960. Its totient is φ = 447946103808.

The previous prime is 606610661603. The next prime is 606610661611. The reversal of 606610661605 is 506166016606.

It can be written as a sum of positive squares in 8 ways, for example, as 207295358209 + 399315303396 = 455297^2 + 631914^2 .

It is a cyclic number.

It is not a de Polignac number, because 606610661605 - 2¹ = 606610661603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606610661603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666829 + ... + 2885341.

It is an arithmetic number, because the mean of its divisors is an integer number (48996847935).

Almost surely, 2^606610661605 is an apocalyptic number.

606610661605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

606610661605 is a deficient number, since it is larger than the sum of its proper divisors (177338905355).

606610661605 is a wasteful number, since it uses less digits than its factorization.

606610661605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261240.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 606610661605 in words is "six hundred six billion, six hundred ten million, six hundred sixty-one thousand, six hundred five".