1566533641 has 8 divisors (see below), whose sum is σ = 1684068480. Its totient is φ = 1452507408.

The previous prime is 1566533621. The next prime is 1566533653. The reversal of 1566533641 is 1463356651.

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 1566533641 - 2¹⁷ = 1566402569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1566533594 and 1566533603.

It is not an unprimeable number, because it can be changed into a prime (1566533621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876226 + ... + 878011.

It is an arithmetic number, because the mean of its divisors is an integer number (210508560).

Almost surely, 2^1566533641 is an apocalyptic number.

It is an amenable number.

1566533641 is a deficient number, since it is larger than the sum of its proper divisors (117534839).

1566533641 is a wasteful number, since it uses less digits than its factorization.

1566533641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754303.

The product of its digits is 194400, while the sum is 40.

The square root of 1566533641 is about 39579.4598371428. The cubic root of 1566533641 is about 1161.3948838799.

The spelling of 1566533641 in words is "one billion, five hundred sixty-six million, five hundred thirty-three thousand, six hundred forty-one".