6669158 has 4 divisors (see below), whose sum is σ = 10003740. Its totient is φ = 3334578.

The previous prime is 6669137. The next prime is 6669161. The reversal of 6669158 is 8519666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8519666 = 2 ⋅4259833.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667288 + ... + 1667291.

It is an arithmetic number, because the mean of its divisors is an integer number (2500935).

Almost surely, 2^6669158 is an apocalyptic number.

6669158 is a deficient number, since it is larger than the sum of its proper divisors (3334582).

6669158 is a wasteful number, since it uses less digits than its factorization.

6669158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334581.

The product of its digits is 77760, while the sum is 41.

The square root of 6669158 is about 2582.4712970331. The cubic root of 6669158 is about 188.2306472007.

The spelling of 6669158 in words is "six million, six hundred sixty-nine thousand, one hundred fifty-eight".