1666839629460 has 48 divisors (see below), whose sum is σ = 4690604016000. Its totient is φ = 442256943744.

The previous prime is 1666839629407. The next prime is 1666839629461. The reversal of 1666839629460 is 649269386661.

It is a junction number, because it is equal to n+sod(n) for n = 1666839629391 and 1666839629400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666839629461) 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, 69788715 + ... + 69812594.

It is an arithmetic number, because the mean of its divisors is an integer number (97720917000).

Almost surely, 2^{1666839629460} is an apocalyptic number.

1666839629460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666839629460 is an abundant number, since it is smaller than the sum of its proper divisors (3023764386540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666839629460 is a wasteful number, since it uses less digits than its factorization.

1666839629460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139601520 (or 139601518 counting only the distinct ones).

The product of its (nonzero) digits is 120932352, while the sum is 66.

The spelling of 1666839629460 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-nine million, six hundred twenty-nine thousand, four hundred sixty".