6664658 has 32 divisors (see below), whose sum is σ = 13426560. Its totient is φ = 2396160.

The previous prime is 6664657. The next prime is 6664661. The reversal of 6664658 is 8564666.

It is not an unprimeable number, because it can be changed into a prime (6664657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338 + ... + 3666.

It is an arithmetic number, because the mean of its divisors is an integer number (419580).

Almost surely, 2^6664658 is an apocalyptic number.

6664658 is an abundant number, since it is smaller than the sum of its proper divisors (6761902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664658 is a wasteful number, since it uses less digits than its factorization.

6664658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362.

The product of its digits is 207360, while the sum is 41.

The square root of 6664658 is about 2581.5998915401. The cubic root of 6664658 is about 188.1883016004.

The spelling of 6664658 in words is "six million, six hundred sixty-four thousand, six hundred fifty-eight".