6664370 has 8 divisors (see below), whose sum is σ = 11995884. Its totient is φ = 2665744.

The previous prime is 6664351. The next prime is 6664381. The reversal of 6664370 is 734666.

It can be written as a sum of positive squares in 2 ways, for example, as 6661561 + 2809 = 2581^2 + 53^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333209 + ... + 333228.

Almost surely, 2^6664370 is an apocalyptic number.

6664370 is a deficient number, since it is larger than the sum of its proper divisors (5331514).

6664370 is a wasteful number, since it uses less digits than its factorization.

6664370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666444.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 6664370 is about 2581.5441115735. The cubic root of 6664370 is about 188.1855908331.

The spelling of 6664370 in words is "six million, six hundred sixty-four thousand, three hundred seventy".