664650955 has 8 divisors (see below), whose sum is σ = 844497792. Its totient is φ = 500443008.

The previous prime is 664650953. The next prime is 664650967. The reversal of 664650955 is 559056466.

It is a happy number.

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

It is not a de Polignac number, because 664650955 - 2¹ = 664650953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664650953) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3909627 + ... + 3909796.

It is an arithmetic number, because the mean of its divisors is an integer number (105562224).

Almost surely, 2^664650955 is an apocalyptic number.

664650955 is a deficient number, since it is larger than the sum of its proper divisors (179846837).

664650955 is a wasteful number, since it uses less digits than its factorization.

664650955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819445.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 664650955 is about 25780.8253358964. The cubic root of 664650955 is about 872.6991327157.

The spelling of 664650955 in words is "six hundred sixty-four million, six hundred fifty thousand, nine hundred fifty-five".