866000645 has 8 divisors (see below), whose sum is σ = 1039892256. Its totient is φ = 692339536.

The previous prime is 866000633. The next prime is 866000657. The reversal of 866000645 is 546000668.

It is an interprime number because it is at equal distance from previous prime (866000633) and next prime (866000657).

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 866000645 - 2¹⁰ = 865999621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49247 + ... + 64476.

It is an arithmetic number, because the mean of its divisors is an integer number (129986532).

Almost surely, 2^866000645 is an apocalyptic number.

It is an amenable number.

866000645 is a deficient number, since it is larger than the sum of its proper divisors (173891611).

866000645 is a wasteful number, since it uses less digits than its factorization.

866000645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115251.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 866000645 is about 29427.8888981184. Note that the first 4 decimals coincide. The cubic root of 866000645 is about 953.1752093876.

The spelling of 866000645 in words is "eight hundred sixty-six million, six hundred forty-five", and thus it is an aban number.