6669491 has 8 divisors (see below), whose sum is σ = 7087680. Its totient is φ = 6254208.

The previous prime is 6669473. The next prime is 6669493. The reversal of 6669491 is 1949666.

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 6669491 - 2¹⁴ = 6653107 is a prime.

It is a super-2 number, since 2×6669491² = 88964220398162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6669493) 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, 5705 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (885960).

Almost surely, 2^6669491 is an apocalyptic number.

6669491 is a deficient number, since it is larger than the sum of its proper divisors (418189).

6669491 is a wasteful number, since it uses less digits than its factorization.

6669491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453.

The product of its digits is 69984, while the sum is 41.

The square root of 6669491 is about 2582.5357693554. The cubic root of 6669491 is about 188.2337800181.

The spelling of 6669491 in words is "six million, six hundred sixty-nine thousand, four hundred ninety-one".