1566428101 has 4 divisors (see below), whose sum is σ = 1790203552. Its totient is φ = 1342652652.

The previous prime is 1566428099. The next prime is 1566428137. The reversal of 1566428101 is 1018246651.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1018246651 = 19 ⋅53591929.

It is a cyclic number.

It is not a de Polignac number, because 1566428101 - 2¹ = 1566428099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566428141) 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, 111887715 + ... + 111887728.

It is an arithmetic number, because the mean of its divisors is an integer number (447550888).

Almost surely, 2^1566428101 is an apocalyptic number.

It is an amenable number.

1566428101 is a deficient number, since it is larger than the sum of its proper divisors (223775451).

1566428101 is an equidigital number, since it uses as much as digits as its factorization.

1566428101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223775450.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1566428101 is about 39578.1265473746. The cubic root of 1566428101 is about 1161.3688015868.

The spelling of 1566428101 in words is "one billion, five hundred sixty-six million, four hundred twenty-eight thousand, one hundred one".