866051005 has 16 divisors (see below), whose sum is σ = 1061786880. Its totient is φ = 677896128.

The previous prime is 866050979. The next prime is 866051047. The reversal of 866051005 is 500150668.

It is a cyclic number.

It is not a de Polignac number, because 866051005 - 2²³ = 857662397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96124 + ... + 104746.

It is an arithmetic number, because the mean of its divisors is an integer number (66361680).

Almost surely, 2^866051005 is an apocalyptic number.

It is an amenable number.

866051005 is a deficient number, since it is larger than the sum of its proper divisors (195735875).

866051005 is a wasteful number, since it uses less digits than its factorization.

866051005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 866051005 is about 29428.7445365921. The cubic root of 866051005 is about 953.1936854990.

The spelling of 866051005 in words is "eight hundred sixty-six million, fifty-one thousand, five".