6866145 has 72 divisors (see below), whose sum is σ = 14233128. Its totient is φ = 3041280.

The previous prime is 6866143. The next prime is 6866149. The reversal of 6866145 is 5416686.

6866145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 69696 + 6796449 = 264^2 + 2607^2 .

It is not a de Polignac number, because 6866145 - 2¹ = 6866143 is a prime.

It is a super-2 number, since 2×6866145² = 94287894322050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866143) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 70737 + ... + 70833.

Almost surely, 2^6866145 is an apocalyptic number.

6866145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6866145 is an abundant number, since it is smaller than the sum of its proper divisors (7366983).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6866145 is a wasteful number, since it uses less digits than its factorization.

6866145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 129 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 6866145 is about 2620.3329941059. The cubic root of 6866145 is about 190.0659512508.

The spelling of 6866145 in words is "six million, eight hundred sixty-six thousand, one hundred forty-five".