20006600641 has 8 divisors (see below), whose sum is σ = 20061566784. Its totient is φ = 19951710000.

The previous prime is 20006600633. The next prime is 20006600659. The reversal of 20006600641 is 14600660002.

It is a happy number.

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 20006600641 - 2³ = 20006600633 is a prime.

It is a super-2 number, since 2×20006600641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20006600041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533766 + ... + 570016.

It is an arithmetic number, because the mean of its divisors is an integer number (2507695848).

Almost surely, 2^20006600641 is an apocalyptic number.

It is an amenable number.

20006600641 is a deficient number, since it is larger than the sum of its proper divisors (54966143).

20006600641 is an equidigital number, since it uses as much as digits as its factorization.

20006600641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37751.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 20006600641 in words is "twenty billion, six million, six hundred thousand, six hundred forty-one".