1020605566 has 8 divisors (see below), whose sum is σ = 1531154520. Its totient is φ = 510220728.

The previous prime is 1020605563. The next prime is 1020605587. The reversal of 1020605566 is 6655060201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020605561) 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, 24081 + ... + 51196.

It is an arithmetic number, because the mean of its divisors is an integer number (191394315).

Almost surely, 2^1020605566 is an apocalyptic number.

1020605566 is a deficient number, since it is larger than the sum of its proper divisors (510548954).

1020605566 is an equidigital number, since it uses as much as digits as its factorization.

1020605566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82058.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1020605566 is about 31946.9179421114. The cubic root of 1020605566 is about 1006.8218781529.

Adding to 1020605566 its reverse (6655060201), we get a palindrome (7675665767).

The spelling of 1020605566 in words is "one billion, twenty million, six hundred five thousand, five hundred sixty-six".