686666325 has 24 divisors (see below), whose sum is σ = 1153907296. Its totient is φ = 360216000.

The previous prime is 686666291. The next prime is 686666333. The reversal of 686666325 is 523666686.

It is not a de Polignac number, because 686666325 - 2¹⁵ = 686633557 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 23 ways as a sum of consecutive naturals, for example, 70471 + ... + 79620.

Almost surely, 2^686666325 is an apocalyptic number.

It is an amenable number.

686666325 is a deficient number, since it is larger than the sum of its proper divisors (467240971).

686666325 is a wasteful number, since it uses less digits than its factorization.

686666325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150165 (or 150160 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The square root of 686666325 is about 26204.3188234306. The cubic root of 686666325 is about 882.2301924867.

The spelling of 686666325 in words is "six hundred eighty-six million, six hundred sixty-six thousand, three hundred twenty-five".