1061566601 has 4 divisors (see below), whose sum is σ = 1061636100. Its totient is φ = 1061497104.

The previous prime is 1061566553. The next prime is 1061566619. The reversal of 1061566601 is 1066651601.

1061566601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1066651601 = 79 ⋅13501919.

It can be written as a sum of positive squares in 2 ways, for example, as 588547600 + 473019001 = 24260^2 + 21749^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061566601 - 2²² = 1057372297 is a prime.

It is a super-2 number, since 2×1061566601² = 2253847296717386402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1061566621) 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, 746 + ... + 46083.

It is an arithmetic number, because the mean of its divisors is an integer number (265409025).

Almost surely, 2^1061566601 is an apocalyptic number.

It is an amenable number.

1061566601 is a deficient number, since it is larger than the sum of its proper divisors (69499).

1061566601 is an equidigital number, since it uses as much as digits as its factorization.

1061566601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69498.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1061566601 is about 32581.6911930612. The cubic root of 1061566601 is about 1020.1148790898.

The spelling of 1061566601 in words is "one billion, sixty-one million, five hundred sixty-six thousand, six hundred one".