665467825 has 12 divisors (see below), whose sum is σ = 900196848. Its totient is φ = 483976400.

The previous prime is 665467813. The next prime is 665467883. The reversal of 665467825 is 528764566.

It is a happy number.

It is not a de Polignac number, because 665467825 - 2⁷ = 665467697 is a prime.

It is a super-2 number, since 2×665467825² = 885694852220461250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1209667 + ... + 1210216.

It is an arithmetic number, because the mean of its divisors is an integer number (75016404).

Almost surely, 2^665467825 is an apocalyptic number.

It is an amenable number.

665467825 is a deficient number, since it is larger than the sum of its proper divisors (234729023).

665467825 is a wasteful number, since it uses less digits than its factorization.

665467825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419904 (or 2419899 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 49.

The square root of 665467825 is about 25796.6630593959. The cubic root of 665467825 is about 873.0565082101.

The spelling of 665467825 in words is "six hundred sixty-five million, four hundred sixty-seven thousand, eight hundred twenty-five".