1066056220561 has 8 divisors (see below), whose sum is σ = 1074139484544. Its totient is φ = 1057993191360.

The previous prime is 1066056220543. The next prime is 1066056220577. The reversal of 1066056220561 is 1650226506601.

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 1066056220561 - 2⁵ = 1066056220529 is a prime.

It is a super-2 number, since 2×1066056220561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066056220501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4952920 + ... + 5163673.

It is an arithmetic number, because the mean of its divisors is an integer number (134267435568).

Almost surely, 2^{1066056220561} is an apocalyptic number.

It is an amenable number.

1066056220561 is a deficient number, since it is larger than the sum of its proper divisors (8083263983).

1066056220561 is a wasteful number, since it uses less digits than its factorization.

1066056220561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117391.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1066056220561 in words is "one trillion, sixty-six billion, fifty-six million, two hundred twenty thousand, five hundred sixty-one".