1006644661 has 8 divisors (see below), whose sum is σ = 1099587744. Its totient is φ = 913939920.

The previous prime is 1006644659. The next prime is 1006644673. The reversal of 1006644661 is 1664466001.

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 1006644661 - 2¹ = 1006644659 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 (1006644601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50691 + ... + 67696.

It is an arithmetic number, because the mean of its divisors is an integer number (137448468).

Almost surely, 2^1006644661 is an apocalyptic number.

1006644661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1006644661 is a deficient number, since it is larger than the sum of its proper divisors (92943083).

1006644661 is a wasteful number, since it uses less digits than its factorization.

1006644661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119171.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1006644661 is about 31727.6639701066. The cubic root of 1006644661 is about 1002.2099993051.

The spelling of 1006644661 in words is "one billion, six million, six hundred forty-four thousand, six hundred sixty-one".