1566643132 has 12 divisors (see below), whose sum is σ = 2741933376. Its totient is φ = 783233600.

The previous prime is 1566643121. The next prime is 1566643153. The reversal of 1566643132 is 2313466651.

It is a junction number, because it is equal to n+sod(n) for n = 1566643091 and 1566643100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33813 + ... + 65395.

It is an arithmetic number, because the mean of its divisors is an integer number (228494448).

Almost surely, 2^1566643132 is an apocalyptic number.

It is an amenable number.

1566643132 is a deficient number, since it is larger than the sum of its proper divisors (1175290244).

1566643132 is a wasteful number, since it uses less digits than its factorization.

1566643132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43988 (or 43986 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1566643132 is about 39580.8429925387. The cubic root of 1566643132 is about 1161.4219413528.

The spelling of 1566643132 in words is "one billion, five hundred sixty-six million, six hundred forty-three thousand, one hundred thirty-two".