6123606661 has 4 divisors (see below), whose sum is σ = 6157438924. Its totient is φ = 6089774400.

The previous prime is 6123606613. The next prime is 6123606673. The reversal of 6123606661 is 1666063216.

6123606661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2532001761 + 3591604900 = 50319^2 + 59930^2 .

It is a cyclic number.

It is not a de Polignac number, because 6123606661 - 2¹³ = 6123598469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6123606661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6123606611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16915860 + ... + 16916221.

It is an arithmetic number, because the mean of its divisors is an integer number (1539359731).

Almost surely, 2^6123606661 is an apocalyptic number.

It is an amenable number.

6123606661 is a deficient number, since it is larger than the sum of its proper divisors (33832263).

6123606661 is a wasteful number, since it uses less digits than its factorization.

6123606661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33832262.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 6123606661 is about 78253.4769898437. The cubic root of 6123606661 is about 1829.5141056230.

Adding to 6123606661 its reverse (1666063216), we get a palindrome (7789669877).

The spelling of 6123606661 in words is "six billion, one hundred twenty-three million, six hundred six thousand, six hundred sixty-one".