6690869 has 8 divisors (see below), whose sum is σ = 7091040. Its totient is φ = 6295536.

The previous prime is 6690863. The next prime is 6690881. The reversal of 6690869 is 9680966.

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

It is not a de Polignac number, because 6690869 - 2¹² = 6686773 is a prime.

It is a super-2 number, since 2×6690869² = 89535455950322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690863) 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, 1862 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (886380).

Almost surely, 2^6690869 is an apocalyptic number.

It is an amenable number.

6690869 is a deficient number, since it is larger than the sum of its proper divisors (400171).

6690869 is a wasteful number, since it uses less digits than its factorization.

6690869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 6690869 is about 2586.6714132259. The cubic root of 6690869 is about 188.4346833999.

The spelling of 6690869 in words is "six million, six hundred ninety thousand, eight hundred sixty-nine".