11061665561005 has 8 divisors (see below), whose sum is σ = 13280198592024. Its totient is φ = 8845199169600.

The previous prime is 11061665560991. The next prime is 11061665561021. The reversal of 11061665561005 is 50016556616011.

It can be written as a sum of positive squares in 4 ways, for example, as 918695412196 + 10142970148809 = 958486^2 + 3184803^2 .

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

It is not a de Polignac number, because 11061665561005 - 2⁴¹ = 8862642305453 is a prime.

It is a super-2 number, since 2×11061665561005² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516648126 + ... + 516669535.

It is an arithmetic number, because the mean of its divisors is an integer number (1660024824003).

Almost surely, 2^{11061665561005} is an apocalyptic number.

It is an amenable number.

11061665561005 is a deficient number, since it is larger than the sum of its proper divisors (2218533031019).

11061665561005 is a wasteful number, since it uses less digits than its factorization.

11061665561005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033319807.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 11061665561005 in words is "eleven trillion, sixty-one billion, six hundred sixty-five million, five hundred sixty-one thousand, five".