664328951 has 16 divisors (see below), whose sum is σ = 782345760. Its totient is φ = 556139520.

The previous prime is 664328947. The next prime is 664328971. The reversal of 664328951 is 159823466.

It is a cyclic number.

It is not a de Polignac number, because 664328951 - 2² = 664328947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664328971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56555 + ... + 67283.

It is an arithmetic number, because the mean of its divisors is an integer number (48896610).

Almost surely, 2^664328951 is an apocalyptic number.

664328951 is a deficient number, since it is larger than the sum of its proper divisors (118016809).

664328951 is a wasteful number, since it uses less digits than its factorization.

664328951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11186.

The product of its digits is 311040, while the sum is 44.

The square root of 664328951 is about 25774.5795504020. The cubic root of 664328951 is about 872.5581775259.

The spelling of 664328951 in words is "six hundred sixty-four million, three hundred twenty-eight thousand, nine hundred fifty-one".