1660201066605 has 32 divisors (see below), whose sum is σ = 2662729977600. Its totient is φ = 883305027072.

The previous prime is 1660201066577. The next prime is 1660201066619. The reversal of 1660201066605 is 5066601020661.

It is not a de Polignac number, because 1660201066605 - 2⁷ = 1660201066477 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 72877977 + ... + 72900753.

It is an arithmetic number, because the mean of its divisors is an integer number (83210311800).

Almost surely, 2^{1660201066605} is an apocalyptic number.

1660201066605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660201066605 is a deficient number, since it is larger than the sum of its proper divisors (1002528910995).

1660201066605 is a wasteful number, since it uses less digits than its factorization.

1660201066605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34293.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 1660201066605 in words is "one trillion, six hundred sixty billion, two hundred one million, sixty-six thousand, six hundred five".