1620666167166 has 40 divisors (see below), whose sum is σ = 3633134493384. Its totient is φ = 539977823280.

The previous prime is 1620666167093. The next prime is 1620666167191. The reversal of 1620666167166 is 6617616660261.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1901800 + ... + 2618811.

Almost surely, 2^{1620666167166} is an apocalyptic number.

1620666167166 is an abundant number, since it is smaller than the sum of its proper divisors (2012468326218).

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

1620666167166 is a wasteful number, since it uses less digits than its factorization.

1620666167166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522838 (or 4522829 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 1620666167166 in words is "one trillion, six hundred twenty billion, six hundred sixty-six million, one hundred sixty-seven thousand, one hundred sixty-six".