1676866321 has 4 divisors (see below), whose sum is σ = 1805856052. Its totient is φ = 1547876592.

The previous prime is 1676866309. The next prime is 1676866343. The reversal of 1676866321 is 1236686761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1236686761 = 12263 ⋅100847.

It can be written as a sum of positive squares in 2 ways, for example, as 463110400 + 1213755921 = 21520^2 + 34839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1676866321 - 2⁹ = 1676865809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1676866361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64494846 + ... + 64494871.

It is an arithmetic number, because the mean of its divisors is an integer number (451464013).

Almost surely, 2^1676866321 is an apocalyptic number.

It is an amenable number.

1676866321 is a deficient number, since it is larger than the sum of its proper divisors (128989731).

1676866321 is a wasteful number, since it uses less digits than its factorization.

1676866321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128989730.

The product of its digits is 435456, while the sum is 46.

The square root of 1676866321 is about 40949.5582515856. The cubic root of 1676866321 is about 1188.0447898953.

The spelling of 1676866321 in words is "one billion, six hundred seventy-six million, eight hundred sixty-six thousand, three hundred twenty-one".