6520066 has 32 divisors (see below), whose sum is σ = 11797632. Its totient is φ = 2643840.

The previous prime is 6520057. The next prime is 6520067. The reversal of 6520066 is 6600256.

It is a super-2 number, since 2×6520066² = 85022521288712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6520066.

It is not an unprimeable number, because it can be changed into a prime (6520067) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21085 + ... + 21391.

It is an arithmetic number, because the mean of its divisors is an integer number (368676).

Almost surely, 2^6520066 is an apocalyptic number.

6520066 is a deficient number, since it is larger than the sum of its proper divisors (5277566).

6520066 is a wasteful number, since it uses less digits than its factorization.

6520066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6520066 is about 2553.4419907255. The cubic root of 6520066 is about 186.8174030467.

The spelling of 6520066 in words is "six million, five hundred twenty thousand, sixty-six".