1000566601 has 4 divisors (see below), whose sum is σ = 1001005252. Its totient is φ = 1000127952.

The previous prime is 1000566587. The next prime is 1000566607. The reversal of 1000566601 is 1066650001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 334926601 + 665640000 = 18301^2 + 25800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000566601 - 2¹¹ = 1000564553 is a prime.

It is a super-4 number, since 4×1000566601⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000566607) 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, 215886 + ... + 220471.

It is an arithmetic number, because the mean of its divisors is an integer number (250251313).

Almost surely, 2^1000566601 is an apocalyptic number.

It is an amenable number.

1000566601 is a deficient number, since it is larger than the sum of its proper divisors (438651).

1000566601 is an equidigital number, since it uses as much as digits as its factorization.

1000566601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438650.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1000566601 is about 31631.7340814569. The cubic root of 1000566601 is about 1000.1888313405.

The spelling of 1000566601 in words is "one billion, five hundred sixty-six thousand, six hundred one".