1666835018352 has 60 divisors (see below), whose sum is σ = 5331226292080. Its totient is φ = 476238576384.

The previous prime is 1666835018309. The next prime is 1666835018447. The reversal of 1666835018352 is 2538105386661.

It is a happy number.

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, 826802077 + ... + 826804092.

Almost surely, 2^{1666835018352} is an apocalyptic number.

1666835018352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1666835018352 is an abundant number, since it is smaller than the sum of its proper divisors (3664391273728).

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

1666835018352 is a wasteful number, since it uses less digits than its factorization.

1666835018352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653606190 (or 1653606181 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 1666835018352 in words is "one trillion, six hundred sixty-six billion, eight hundred thirty-five million, eighteen thousand, three hundred fifty-two".