5921666 has 8 divisors (see below), whose sum is σ = 8893260. Its totient is φ = 2957248.

The previous prime is 5921639. The next prime is 5921677. The reversal of 5921666 is 6661295.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5784025 + 137641 = 2405^2 + 371^2 .

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

It is a super-2 number, since 2×5921666² = 70132256431112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430 + ... + 3726.

Almost surely, 2^5921666 is an apocalyptic number.

5921666 is a deficient number, since it is larger than the sum of its proper divisors (2971594).

5921666 is a wasteful number, since it uses less digits than its factorization.

5921666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588.

The product of its digits is 19440, while the sum is 35.

The square root of 5921666 is about 2433.4473489270. The cubic root of 5921666 is about 180.9178019776.

The spelling of 5921666 in words is "five million, nine hundred twenty-one thousand, six hundred sixty-six".