1660806898128 has 60 divisors (see below), whose sum is σ = 5311945875808. Its totient is φ = 474516256320.

The previous prime is 1660806898117. The next prime is 1660806898147. The reversal of 1660806898128 is 8218986080661.

1660806898128 is a `hidden beast` number, since 1 + 6 + 608 + 0 + 6 + 8 + 9 + 8 + 12 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 11 ways as a sum of consecutive naturals, for example, 823811938 + ... + 823813953.

Almost surely, 2^{1660806898128} is an apocalyptic number.

1660806898128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1660806898128 is an abundant number, since it is smaller than the sum of its proper divisors (3651138977680).

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

1660806898128 is a wasteful number, since it uses less digits than its factorization.

1660806898128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647625912 (or 1647625903 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 1660806898128 in words is "one trillion, six hundred sixty billion, eight hundred six million, eight hundred ninety-eight thousand, one hundred twenty-eight".