1666812922 has 8 divisors (see below), whose sum is σ = 2541206772. Its totient is φ = 819744000.

The previous prime is 1666812919. The next prime is 1666812949. The reversal of 1666812922 is 2292186661.

It can be written as a sum of positive squares in 2 ways, for example, as 1493126881 + 173686041 = 38641^2 + 13179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6831079 + ... + 6831322.

Almost surely, 2^1666812922 is an apocalyptic number.

1666812922 is a deficient number, since it is larger than the sum of its proper divisors (874393850).

1666812922 is a wasteful number, since it uses less digits than its factorization.

1666812922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13662464.

The product of its digits is 124416, while the sum is 43.

The square root of 1666812922 is about 40826.6202617851. The cubic root of 1666812922 is about 1185.6657814567.

The spelling of 1666812922 in words is "one billion, six hundred sixty-six million, eight hundred twelve thousand, nine hundred twenty-two".