10661065067521 has 4 divisors (see below), whose sum is σ = 11630252800944. Its totient is φ = 9691877334100.

The previous prime is 10661065067501. The next prime is 10661065067531. The reversal of 10661065067521 is 12576056016601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10661065067521 - 2¹³ = 10661065059329 is a prime.

It is a super-2 number, since 2×10661065067521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661065067501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484593866695 + ... + 484593866716.

It is an arithmetic number, because the mean of its divisors is an integer number (2907563200236).

Almost surely, 2^{10661065067521} is an apocalyptic number.

10661065067521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10661065067521 is a deficient number, since it is larger than the sum of its proper divisors (969187733423).

10661065067521 is an equidigital number, since it uses as much as digits as its factorization.

10661065067521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969187733422.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 10661065067521 in words is "ten trillion, six hundred sixty-one billion, sixty-five million, sixty-seven thousand, five hundred twenty-one".