1660643263433 has 16 divisors (see below), whose sum is σ = 2192201345664. Its totient is φ = 1217889634560.

The previous prime is 1660643263387. The next prime is 1660643263441. The reversal of 1660643263433 is 3343623460661.

It is a cyclic number.

It is not a de Polignac number, because 1660643263433 - 2¹⁴ = 1660643247049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660643263463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634316210 + ... + 634318827.

It is an arithmetic number, because the mean of its divisors is an integer number (137012584104).

Almost surely, 2^{1660643263433} is an apocalyptic number.

It is an amenable number.

1660643263433 is a deficient number, since it is larger than the sum of its proper divisors (531558082231).

1660643263433 is a wasteful number, since it uses less digits than its factorization.

1660643263433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268635072.

The product of its (nonzero) digits is 3359232, while the sum is 47.

The spelling of 1660643263433 in words is "one trillion, six hundred sixty billion, six hundred forty-three million, two hundred sixty-three thousand, four hundred thirty-three".