664145635 has 8 divisors (see below), whose sum is σ = 804028320. Its totient is φ = 526614144.

The previous prime is 664145609. The next prime is 664145641. The reversal of 664145635 is 536541466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664145635 - 2²⁹ = 127274723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587175 + ... + 588304.

It is an arithmetic number, because the mean of its divisors is an integer number (100503540).

Almost surely, 2^664145635 is an apocalyptic number.

664145635 is a deficient number, since it is larger than the sum of its proper divisors (139882685).

664145635 is a wasteful number, since it uses less digits than its factorization.

664145635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175597.

The product of its digits is 259200, while the sum is 40.

The square root of 664145635 is about 25771.0231655633. The cubic root of 664145635 is about 872.4779117732.

The spelling of 664145635 in words is "six hundred sixty-four million, one hundred forty-five thousand, six hundred thirty-five".