10111606661 has 8 divisors (see below), whose sum is σ = 10931797464. Its totient is φ = 9297469440.

The previous prime is 10111606657. The next prime is 10111606723. The reversal of 10111606661 is 16660611101.

It can be written as a sum of positive squares in 4 ways, for example, as 4897900225 + 5213706436 = 69985^2 + 72206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10111606661 - 2² = 10111606657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111606651) 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 7 ways as a sum of consecutive naturals, for example, 1509920 + ... + 1516601.

It is an arithmetic number, because the mean of its divisors is an integer number (1366474683).

Almost surely, 2^10111606661 is an apocalyptic number.

It is an amenable number.

10111606661 is a deficient number, since it is larger than the sum of its proper divisors (820190803).

10111606661 is a wasteful number, since it uses less digits than its factorization.

10111606661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026791.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 10111606661 in words is "ten billion, one hundred eleven million, six hundred six thousand, six hundred sixty-one".