866672225 has 6 divisors (see below), whose sum is σ = 1074673590. Its totient is φ = 693337760.

The previous prime is 866672203. The next prime is 866672231. The reversal of 866672225 is 522276668.

866672225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 45104656 + 821567569 = 6716^2 + 28663^2 .

It is not a de Polignac number, because 866672225 - 2²² = 862477921 is a prime.

It is a super-2 number, since 2×866672225² = 1502241491172901250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17333420 + ... + 17333469.

It is an arithmetic number, because the mean of its divisors is an integer number (179112265).

Almost surely, 2^866672225 is an apocalyptic number.

It is an amenable number.

866672225 is a deficient number, since it is larger than the sum of its proper divisors (208001365).

866672225 is a wasteful number, since it uses less digits than its factorization.

866672225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34666899 (or 34666894 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 866672225 is about 29439.2972912058. The cubic root of 866672225 is about 953.4215402298.

The spelling of 866672225 in words is "eight hundred sixty-six million, six hundred seventy-two thousand, two hundred twenty-five".