666204465 has 16 divisors (see below), whose sum is σ = 1066249728. Its totient is φ = 355201536.

The previous prime is 666204401. The next prime is 666204493. The reversal of 666204465 is 564402666.

It is not a de Polignac number, because 666204465 - 2⁶ = 666204401 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 84064 + ... + 91646.

It is an arithmetic number, because the mean of its divisors is an integer number (66640608).

Almost surely, 2^666204465 is an apocalyptic number.

It is an amenable number.

666204465 is a deficient number, since it is larger than the sum of its proper divisors (400045263).

666204465 is a wasteful number, since it uses less digits than its factorization.

666204465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13448.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 666204465 is about 25810.9369260397. The cubic root of 666204465 is about 873.3785328891.

The spelling of 666204465 in words is "six hundred sixty-six million, two hundred four thousand, four hundred sixty-five".