664376263 has 8 divisors (see below), whose sum is σ = 669162240. Its totient is φ = 659607480.

The previous prime is 664376261. The next prime is 664376299. The reversal of 664376263 is 362673466.

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 664376263 - 2¹ = 664376261 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 (664376261) 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, 78928 + ... + 86938.

It is an arithmetic number, because the mean of its divisors is an integer number (83645280).

Almost surely, 2^664376263 is an apocalyptic number.

664376263 is a deficient number, since it is larger than the sum of its proper divisors (4785977).

664376263 is a wasteful number, since it uses less digits than its factorization.

664376263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597.

The product of its digits is 653184, while the sum is 43.

The square root of 664376263 is about 25775.4973375879. The cubic root of 664376263 is about 872.5788909051.

The spelling of 664376263 in words is "six hundred sixty-four million, three hundred seventy-six thousand, two hundred sixty-three".