866934729 has 12 divisors (see below), whose sum is σ = 1295420100. Its totient is φ = 558026784.

The previous prime is 866934707. The next prime is 866934781. The reversal of 866934729 is 927439668.

It is a happy number.

866934729 is a `hidden beast` number, since 86 + 6 + 93 + 472 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 514246329 + 352688400 = 22677^2 + 18780^2 .

It is not a de Polignac number, because 866934729 - 2⁵ = 866934697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866934529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1660534 + ... + 1661055.

It is an arithmetic number, because the mean of its divisors is an integer number (107951675).

Almost surely, 2^866934729 is an apocalyptic number.

It is an amenable number.

866934729 is a deficient number, since it is larger than the sum of its proper divisors (428485371).

866934729 is a wasteful number, since it uses less digits than its factorization.

866934729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321624 (or 3321621 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 866934729 is about 29443.7553481209. The cubic root of 866934729 is about 953.5177902678.

The spelling of 866934729 in words is "eight hundred sixty-six million, nine hundred thirty-four thousand, seven hundred twenty-nine".