10665621801 has 12 divisors (see below), whose sum is σ = 16075720128.
Its totient is φ = 6801265944.
The previous prime is 10665621763. The next prime is 10665621817. The reversal of 10665621801 is 10812656601.
10665621801 is a `hidden beast` number, since 10 + 6 + 6 + 562 + 1 + 80 + 1 = 666.
It is not a de Polignac number, because 10665621801 - 26 = 10665621737 is a prime.
It is a super-2 number, since 2×106656218012 (a number of 21 digits) contains 22 as substring.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (10665621851) 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 11 ways as a sum of consecutive naturals, for example, 25762165 + ... + 25762578.
It is an arithmetic number, because the mean of its divisors is an integer number (1339643344).
Almost surely, 210665621801 is an apocalyptic number.
It is an amenable number.
10665621801 is a deficient number, since it is larger than the sum of its proper divisors (5410098327).
10665621801 is a wasteful number, since it uses less digits than its factorization.
10665621801 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 51524772 (or 51524769 counting only the distinct ones).
The product of its (nonzero) digits is 17280, while the sum is 36.
The spelling of 10665621801 in words is "ten billion, six hundred sixty-five million, six hundred twenty-one thousand, eight hundred one".