6657969 has 4 divisors (see below), whose sum is σ = 8877296. Its totient is φ = 4438644.

The previous prime is 6657953. The next prime is 6657979. The reversal of 6657969 is 9697566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6657969 - 2⁴ = 6657953 is a prime.

It is a super-2 number, since 2×6657969² = 88657102409922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6657919) 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, 1109659 + ... + 1109664.

It is an arithmetic number, because the mean of its divisors is an integer number (2219324).

Almost surely, 2^6657969 is an apocalyptic number.

It is an amenable number.

6657969 is a deficient number, since it is larger than the sum of its proper divisors (2219327).

6657969 is a wasteful number, since it uses less digits than its factorization.

6657969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219326.

The product of its digits is 612360, while the sum is 48.

The square root of 6657969 is about 2580.3040518513. The cubic root of 6657969 is about 188.1253219790.

It can be divided in two parts, 6657 and 969, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 6657969 in words is "six million, six hundred fifty-seven thousand, nine hundred sixty-nine".