1566130001 has 4 divisors (see below), whose sum is σ = 1566297012. Its totient is φ = 1565962992.

The previous prime is 1566129997. The next prime is 1566130009. The reversal of 1566130001 is 1000316651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000316651 = 47 ⋅21283333.

It can be written as a sum of positive squares in 2 ways, for example, as 538286401 + 1027843600 = 23201^2 + 32060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566130001 - 2² = 1566129997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1566130009) 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, 68546 + ... + 88491.

It is an arithmetic number, because the mean of its divisors is an integer number (391574253).

Almost surely, 2^1566130001 is an apocalyptic number.

It is an amenable number.

1566130001 is a deficient number, since it is larger than the sum of its proper divisors (167011).

1566130001 is an equidigital number, since it uses as much as digits as its factorization.

1566130001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167010.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1566130001 is about 39574.3603991271. The cubic root of 1566130001 is about 1161.2951252605.

Adding to 1566130001 its reverse (1000316651), we get a palindrome (2566446652).

The spelling of 1566130001 in words is "one billion, five hundred sixty-six million, one hundred thirty thousand, one".