866295072 has 36 divisors (see below), whose sum is σ = 2463527430. Its totient is φ = 288764928.

The previous prime is 866295043. The next prime is 866295113. The reversal of 866295072 is 270592668.

866295072 is a `hidden beast` number, since 86 + 62 + 9 + 507 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 783776016 + 82519056 = 27996^2 + 9084^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1503697 + ... + 1504272.

Almost surely, 2^866295072 is an apocalyptic number.

It is an amenable number.

866295072 is an abundant number, since it is smaller than the sum of its proper divisors (1597232358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866295072 is a wasteful number, since it uses less digits than its factorization.

866295072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007985 (or 3007974 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 866295072 is about 29432.8909895036. The cubic root of 866295072 is about 953.2832188217.

The spelling of 866295072 in words is "eight hundred sixty-six million, two hundred ninety-five thousand, seventy-two".