866714985 has 40 divisors (see below), whose sum is σ = 1555902216. Its totient is φ = 461583360.

The previous prime is 866714983. The next prime is 866714993. The reversal of 866714985 is 589417668.

866714985 is a `hidden beast` number, since 86 + 6 + 71 + 498 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 270964521 + 595750464 = 16461^2 + 24408^2 .

It is not a de Polignac number, because 866714985 - 2¹ = 866714983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866714983) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 428697 + ... + 430713.

Almost surely, 2^866714985 is an apocalyptic number.

It is an amenable number.

866714985 is a deficient number, since it is larger than the sum of its proper divisors (689187231).

866714985 is a wasteful number, since it uses less digits than its factorization.

866714985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 3086 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 866714985 is about 29440.0235224091. The cubic root of 866714985 is about 953.4372199887.

The spelling of 866714985 in words is "eight hundred sixty-six million, seven hundred fourteen thousand, nine hundred eighty-five".