5667991 has 8 divisors (see below), whose sum is σ = 6508544. Its totient is φ = 4835160.

The previous prime is 5667989. The next prime is 5667997. The reversal of 5667991 is 1997665.

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

It is a cyclic number.

It is not a de Polignac number, because 5667991 - 2¹ = 5667989 is a prime.

It is a super-2 number, since 2×5667991² = 64252243952162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5667997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 3376.

It is an arithmetic number, because the mean of its divisors is an integer number (813568).

Almost surely, 2^5667991 is an apocalyptic number.

5667991 is a deficient number, since it is larger than the sum of its proper divisors (840553).

5667991 is a wasteful number, since it uses less digits than its factorization.

5667991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861.

The product of its digits is 102060, while the sum is 43.

The square root of 5667991 is about 2380.7542922360. The cubic root of 5667991 is about 178.2965955320.

The spelling of 5667991 in words is "five million, six hundred sixty-seven thousand, nine hundred ninety-one".