866298725 has 12 divisors (see below), whose sum is σ = 1075078884. Its totient is φ = 692478720.

The previous prime is 866298707. The next prime is 866298739. The reversal of 866298725 is 527892668.

It can be written as a sum of positive squares in 6 ways, for example, as 3290596 + 863008129 = 1814^2 + 29377^2 .

It is not a de Polignac number, because 866298725 - 2⁶ = 866298661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19067 + ... + 45783.

It is an arithmetic number, because the mean of its divisors is an integer number (89589907).

Almost surely, 2^866298725 is an apocalyptic number.

It is an amenable number.

866298725 is a deficient number, since it is larger than the sum of its proper divisors (208780159).

866298725 is a wasteful number, since it uses less digits than its factorization.

866298725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28024 (or 28019 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 866298725 is about 29432.9530458634. The cubic root of 866298725 is about 953.2845587573.

The spelling of 866298725 in words is "eight hundred sixty-six million, two hundred ninety-eight thousand, seven hundred twenty-five".