1668237434 has 8 divisors (see below), whose sum is σ = 2549570580. Its totient is φ = 818380576.

The previous prime is 1668237413. The next prime is 1668237457. The reversal of 1668237434 is 4347328661.

It can be written as a sum of positive squares in 2 ways, for example, as 1596242209 + 71995225 = 39953^2 + 8485^2 .

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

It is a super-2 number, since 2×1668237434² = 5566032272397808712, which contains 22 as substring.

It is an unprimeable number.

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, 7868939 + ... + 7869150.

Almost surely, 2^1668237434 is an apocalyptic number.

1668237434 is a deficient number, since it is larger than the sum of its proper divisors (881333146).

1668237434 is a wasteful number, since it uses less digits than its factorization.

1668237434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738144.

The product of its digits is 580608, while the sum is 44.

The square root of 1668237434 is about 40844.0624081396. The cubic root of 1668237434 is about 1186.0034546659.

The spelling of 1668237434 in words is "one billion, six hundred sixty-eight million, two hundred thirty-seven thousand, four hundred thirty-four".