664410655 has 8 divisors (see below), whose sum is σ = 802372032. Its totient is φ = 528142368.

The previous prime is 664410641. The next prime is 664410689. The reversal of 664410655 is 556014466.

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 664410655 - 2⁹ = 664410143 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 7 ways as a sum of consecutive naturals, for example, 422407 + ... + 423976.

It is an arithmetic number, because the mean of its divisors is an integer number (100296504).

Almost surely, 2^664410655 is an apocalyptic number.

664410655 is a deficient number, since it is larger than the sum of its proper divisors (137961377).

664410655 is a wasteful number, since it uses less digits than its factorization.

664410655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846545.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 664410655 is about 25776.1644741804. The cubic root of 664410655 is about 872.5939472405.

The spelling of 664410655 in words is "six hundred sixty-four million, four hundred ten thousand, six hundred fifty-five".