1666120102416 has 240 divisors, whose sum is σ = 6155353496448. Its totient is φ = 407302041600.

The previous prime is 1666120102393. The next prime is 1666120102447. The reversal of 1666120102416 is 6142010216661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4231015 + ... + 4608006.

Almost surely, 2^{1666120102416} is an apocalyptic number.

1666120102416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1666120102416 is an abundant number, since it is smaller than the sum of its proper divisors (4489233394032).

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

1666120102416 is a wasteful number, since it uses less digits than its factorization.

1666120102416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8839070 (or 8839061 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 1666120102416 in words is "one trillion, six hundred sixty-six billion, one hundred twenty million, one hundred two thousand, four hundred sixteen".