664040505350 has 48 divisors (see below), whose sum is σ = 1264007669760. Its totient is φ = 259404448800.

The previous prime is 664040505313. The next prime is 664040505379. The reversal of 664040505350 is 53505040466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21138155 + ... + 21169545.

It is an arithmetic number, because the mean of its divisors is an integer number (26333493120).

Almost surely, 2^664040505350 is an apocalyptic number.

664040505350 is a deficient number, since it is larger than the sum of its proper divisors (599967164410).

664040505350 is a wasteful number, since it uses less digits than its factorization.

664040505350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41285 (or 41280 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 664040505350 in words is "six hundred sixty-four billion, forty million, five hundred five thousand, three hundred fifty".