6664477 has 8 divisors (see below), whose sum is σ = 6879672. Its totient is φ = 6451200.

The previous prime is 6664453. The next prime is 6664481. The reversal of 6664477 is 7744666.

It can be written as a sum of positive squares in 4 ways, for example, as 4372281 + 2292196 = 2091^2 + 1514^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664477 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664417) 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, 10077 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (859959).

Almost surely, 2^6664477 is an apocalyptic number.

It is an amenable number.

6664477 is a deficient number, since it is larger than the sum of its proper divisors (215195).

6664477 is a wasteful number, since it uses less digits than its factorization.

6664477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959.

The product of its digits is 169344, while the sum is 40.

The square root of 6664477 is about 2581.5648355213. The cubic root of 6664477 is about 188.1865979676.

The spelling of 6664477 in words is "six million, six hundred sixty-four thousand, four hundred seventy-seven".