11010001661 has 8 divisors (see below), whose sum is σ = 11176099200. Its totient is φ = 10843956288.

The previous prime is 11010001657. The next prime is 11010001679. The reversal of 11010001661 is 16610001011.

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 11010001661 - 2² = 11010001657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010001361) 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, 715925 + ... + 731141.

It is an arithmetic number, because the mean of its divisors is an integer number (1397012400).

Almost surely, 2^11010001661 is an apocalyptic number.

It is an amenable number.

11010001661 is a deficient number, since it is larger than the sum of its proper divisors (166097539).

11010001661 is a wasteful number, since it uses less digits than its factorization.

11010001661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26083.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 11010001661 its reverse (16610001011), we get a palindrome (27620002672).

The spelling of 11010001661 in words is "eleven billion, ten million, one thousand, six hundred sixty-one".