6669431 has 4 divisors (see below), whose sum is σ = 6677664. Its totient is φ = 6661200.

The previous prime is 6669413. The next prime is 6669451. The reversal of 6669431 is 1349666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349666 = 2 ⋅674833.

It is a cyclic number.

It is not a de Polignac number, because 6669431 - 2⁶ = 6669367 is a prime.

It is a super-2 number, since 2×6669431² = 88962619727522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6669391 and 6669400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2750 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (1669416).

Almost surely, 2^6669431 is an apocalyptic number.

6669431 is a deficient number, since it is larger than the sum of its proper divisors (8233).

6669431 is an equidigital number, since it uses as much as digits as its factorization.

6669431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8232.

The product of its digits is 23328, while the sum is 35.

The square root of 6669431 is about 2582.5241528396. The cubic root of 6669431 is about 188.2332155542.

The spelling of 6669431 in words is "six million, six hundred sixty-nine thousand, four hundred thirty-one".