664610670835 has 8 divisors (see below), whose sum is σ = 797543598816. Its totient is φ = 531681340800.

The previous prime is 664610670833. The next prime is 664610670917. The reversal of 664610670835 is 538076016466.

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

It is not a de Polignac number, because 664610670835 - 2¹ = 664610670833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664610670833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474879 + ... + 1246888.

It is an arithmetic number, because the mean of its divisors is an integer number (99692949852).

Almost surely, 2^664610670835 is an apocalyptic number.

664610670835 is a deficient number, since it is larger than the sum of its proper divisors (132932927981).

664610670835 is a wasteful number, since it uses less digits than its factorization.

664610670835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798973.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 664610670835 in words is "six hundred sixty-four billion, six hundred ten million, six hundred seventy thousand, eight hundred thirty-five".