664801623334 has 16 divisors (see below), whose sum is σ = 1002111273216. Its totient is φ = 330765107400.

The previous prime is 664801623319. The next prime is 664801623371. The reversal of 664801623334 is 433326108466.

It is a happy number.

664801623334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664801623334² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218519 + ... + 2500285.

It is an arithmetic number, because the mean of its divisors is an integer number (62631954576).

Almost surely, 2^664801623334 is an apocalyptic number.

664801623334 is a deficient number, since it is larger than the sum of its proper divisors (337309649882).

664801623334 is a wasteful number, since it uses less digits than its factorization.

664801623334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287571.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 664801623334 in words is "six hundred sixty-four billion, eight hundred one million, six hundred twenty-three thousand, three hundred thirty-four".