6662855 has 4 divisors (see below), whose sum is σ = 7995432. Its totient is φ = 5330280.

The previous prime is 6662839. The next prime is 6662857. The reversal of 6662855 is 5582666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6662855 - 2⁴ = 6662839 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666281 + ... + 666290.

It is an arithmetic number, because the mean of its divisors is an integer number (1998858).

Almost surely, 2^6662855 is an apocalyptic number.

6662855 is a deficient number, since it is larger than the sum of its proper divisors (1332577).

6662855 is a wasteful number, since it uses less digits than its factorization.

6662855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332576.

The product of its digits is 86400, while the sum is 38.

The square root of 6662855 is about 2581.2506658595. The cubic root of 6662855 is about 188.1713297813.

The spelling of 6662855 in words is "six million, six hundred sixty-two thousand, eight hundred fifty-five".