1660047399999 has 32 divisors (see below), whose sum is σ = 2649039360000. Its totient is φ = 1024433166240.

The previous prime is 1660047399977. The next prime is 1660047400013. The reversal of 1660047399999 is 9999937400661.

1660047399999 is a `hidden beast` number, since 1 + 6 + 60 + 0 + 473 + 9 + 9 + 9 + 99 = 666.

It is not a de Polignac number, because 1660047399999 - 2⁹ = 1660047399487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660047399499) 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 31 ways as a sum of consecutive naturals, for example, 43096624 + ... + 43135125.

It is an arithmetic number, because the mean of its divisors is an integer number (82782480000).

Almost surely, 2^{1660047399999} is an apocalyptic number.

1660047399999 is a deficient number, since it is larger than the sum of its proper divisors (988991960001).

1660047399999 is a wasteful number, since it uses less digits than its factorization.

1660047399999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86231812 (or 86231806 counting only the distinct ones).

The product of its (nonzero) digits is 178564176, while the sum is 72.

The spelling of 1660047399999 in words is "one trillion, six hundred sixty billion, forty-seven million, three hundred ninety-nine thousand, nine hundred ninety-nine".