1668270938 has 4 divisors (see below), whose sum is σ = 2502406410. Its totient is φ = 834135468.

The previous prime is 1668270931. The next prime is 1668270941. The reversal of 1668270938 is 8390728661.

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

It can be written as a sum of positive squares in only one way, i.e., 1343442409 + 324828529 = 36653^2 + 18023^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1668270931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417067733 + ... + 417067736.

Almost surely, 2^1668270938 is an apocalyptic number.

1668270938 is a deficient number, since it is larger than the sum of its proper divisors (834135472).

1668270938 is an equidigital number, since it uses as much as digits as its factorization.

1668270938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834135471.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 1668270938 is about 40844.4725513747. The cubic root of 1668270938 is about 1186.0113943018.

The spelling of 1668270938 in words is "one billion, six hundred sixty-eight million, two hundred seventy thousand, nine hundred thirty-eight".