1566413863 has 8 divisors (see below), whose sum is σ = 1801171328. Its totient is φ = 1334402424.

The previous prime is 1566413851. The next prime is 1566413939. The reversal of 1566413863 is 3683146651.

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 1566413863 - 2⁵ = 1566413831 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 (1566413843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685281 + ... + 687562.

It is an arithmetic number, because the mean of its divisors is an integer number (225146416).

Almost surely, 2^1566413863 is an apocalyptic number.

1566413863 is a deficient number, since it is larger than the sum of its proper divisors (234757465).

1566413863 is a wasteful number, since it uses less digits than its factorization.

1566413863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373013.

The product of its digits is 311040, while the sum is 43.

The square root of 1566413863 is about 39577.9466748845. The cubic root of 1566413863 is about 1161.3652828341.

The spelling of 1566413863 in words is "one billion, five hundred sixty-six million, four hundred thirteen thousand, eight hundred sixty-three".