1680090166 has 4 divisors (see below), whose sum is σ = 2520135252. Its totient is φ = 840045082.

The previous prime is 1680090163. The next prime is 1680090179. The reversal of 1680090166 is 6610900861.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680090163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420022540 + ... + 420022543.

It is an arithmetic number, because the mean of its divisors is an integer number (630033813).

Almost surely, 2^1680090166 is an apocalyptic number.

1680090166 is a deficient number, since it is larger than the sum of its proper divisors (840045086).

1680090166 is an equidigital number, since it uses as much as digits as its factorization.

1680090166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840045085.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1680090166 is about 40988.9029616554. The cubic root of 1680090166 is about 1188.8056576193.

The spelling of 1680090166 in words is "one billion, six hundred eighty million, ninety thousand, one hundred sixty-six".