1066120561 has 4 divisors (see below), whose sum is σ = 1163040624. Its totient is φ = 969200500.

The previous prime is 1066120537. The next prime is 1066120577. The reversal of 1066120561 is 1650216601.

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 1066120561 - 2⁹ = 1066120049 is a prime.

It is a super-2 number, since 2×1066120561² = 2273226101173909442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066120261) 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 3 ways as a sum of consecutive naturals, for example, 48460015 + ... + 48460036.

It is an arithmetic number, because the mean of its divisors is an integer number (290760156).

Almost surely, 2^1066120561 is an apocalyptic number.

1066120561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1066120561 is a deficient number, since it is larger than the sum of its proper divisors (96920063).

1066120561 is an equidigital number, since it uses as much as digits as its factorization.

1066120561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96920062.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1066120561 is about 32651.5016653140. The cubic root of 1066120561 is about 1021.5715109573.

The spelling of 1066120561 in words is "one billion, sixty-six million, one hundred twenty thousand, five hundred sixty-one".