1668445348 has 24 divisors (see below), whose sum is σ = 3093363000. Its totient is φ = 784685568.

The previous prime is 1668445291. The next prime is 1668445367. The reversal of 1668445348 is 8435448661.

It can be written as a sum of positive squares in 4 ways, for example, as 325369444 + 1343075904 = 18038^2 + 36648^2 .

It is a super-2 number, since 2×1668445348² = 5567419758525682208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126238 + ... + 138826.

It is an arithmetic number, because the mean of its divisors is an integer number (128890125).

Almost surely, 2^1668445348 is an apocalyptic number.

It is an amenable number.

1668445348 is a deficient number, since it is larger than the sum of its proper divisors (1424917652).

1668445348 is a wasteful number, since it uses less digits than its factorization.

1668445348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559 (or 14557 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 49.

The square root of 1668445348 is about 40846.6075457926. The cubic root of 1668445348 is about 1186.0527235277.

The spelling of 1668445348 in words is "one billion, six hundred sixty-eight million, four hundred forty-five thousand, three hundred forty-eight".