866820541 has 8 divisors (see below), whose sum is σ = 874012160. Its totient is φ = 859642848.

The previous prime is 866820533. The next prime is 866820551. The reversal of 866820541 is 145028668.

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

It is a cyclic number.

It is not a de Polignac number, because 866820541 - 2³ = 866820533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866820494 and 866820503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866820551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148225 + ... + 153961.

It is an arithmetic number, because the mean of its divisors is an integer number (109251520).

Almost surely, 2^866820541 is an apocalyptic number.

It is an amenable number.

866820541 is a deficient number, since it is larger than the sum of its proper divisors (7191619).

866820541 is a wasteful number, since it uses less digits than its factorization.

866820541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6963.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 866820541 is about 29441.8161973748. The cubic root of 866820541 is about 953.4759243439.

The spelling of 866820541 in words is "eight hundred sixty-six million, eight hundred twenty thousand, five hundred forty-one".