6620887 has 16 divisors (see below), whose sum is σ = 8415232. Its totient is φ = 5067360.

The previous prime is 6620869. The next prime is 6620899. The reversal of 6620887 is 7880266.

It is a cyclic number.

It is not a de Polignac number, because 6620887 - 2¹¹ = 6618839 is a prime.

It is a super-2 number, since 2×6620887² = 87672289333538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620807) 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, 1648 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (525952).

Almost surely, 2^6620887 is an apocalyptic number.

6620887 is a deficient number, since it is larger than the sum of its proper divisors (1794345).

6620887 is a wasteful number, since it uses less digits than its factorization.

6620887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 6620887 is about 2573.1084314502. The cubic root of 6620887 is about 187.7754127385.

The spelling of 6620887 in words is "six million, six hundred twenty thousand, eight hundred eighty-seven".