2006306610661 has 4 divisors (see below), whose sum is σ = 2006397035532. Its totient is φ = 2006216185792.

The previous prime is 2006306610641. The next prime is 2006306610701. The reversal of 2006306610661 is 1660166036002.

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 1204934313025 + 801372297636 = 1097695^2 + 895194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006306610661 - 2¹⁹ = 2006306086373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2006306610661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006306610641) 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, 45179146 + ... + 45223531.

It is an arithmetic number, because the mean of its divisors is an integer number (501599258883).

Almost surely, 2^{2006306610661} is an apocalyptic number.

It is an amenable number.

2006306610661 is a deficient number, since it is larger than the sum of its proper divisors (90424871).

2006306610661 is an equidigital number, since it uses as much as digits as its factorization.

2006306610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90424870.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 2006306610661 in words is "two trillion, six billion, three hundred six million, six hundred ten thousand, six hundred sixty-one".