1663342611161 has 16 divisors (see below), whose sum is σ = 2075294960640. Its totient is φ = 1295162900880.

The previous prime is 1663342611157. The next prime is 1663342611167. The reversal of 1663342611161 is 1611162433661.

It is a cyclic number.

It is not a de Polignac number, because 1663342611161 - 2² = 1663342611157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663342611167) 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 15 ways as a sum of consecutive naturals, for example, 7795931 + ... + 8006448.

It is an arithmetic number, because the mean of its divisors is an integer number (129705935040).

Almost surely, 2^{1663342611161} is an apocalyptic number.

1663342611161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1663342611161 is a deficient number, since it is larger than the sum of its proper divisors (411952349479).

1663342611161 is a wasteful number, since it uses less digits than its factorization.

1663342611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15803764.

The product of its digits is 93312, while the sum is 41.

The spelling of 1663342611161 in words is "one trillion, six hundred sixty-three billion, three hundred forty-two million, six hundred eleven thousand, one hundred sixty-one".