2663403231661 has 8 divisors (see below), whose sum is σ = 2942685923904. Its totient is φ = 2397744085440.

The previous prime is 2663403231659. The next prime is 2663403231673. The reversal of 2663403231661 is 1661323043662.

2663403231661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2663403231661 - 2¹ = 2663403231659 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 (2663403231611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405886095 + ... + 3405886876.

It is an arithmetic number, because the mean of its divisors is an integer number (367835740488).

Almost surely, 2^{2663403231661} is an apocalyptic number.

It is an amenable number.

2663403231661 is a deficient number, since it is larger than the sum of its proper divisors (279282692243).

2663403231661 is a wasteful number, since it uses less digits than its factorization.

2663403231661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811773011.

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 2663403231661 in words is "two trillion, six hundred sixty-three billion, four hundred three million, two hundred thirty-one thousand, six hundred sixty-one".