664804085435 has 48 divisors (see below), whose sum is σ = 938846635200. Its totient is φ = 450566129664.

The previous prime is 664804085417. The next prime is 664804085453. The reversal of 664804085435 is 534580408466.

It is an interprime number because it is at equal distance from previous prime (664804085417) and next prime (664804085453).

It is not a de Polignac number, because 664804085435 - 2¹⁰ = 664804084411 is a prime.

It is a super-2 number, since 2×664804085435² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9905471 + ... + 9972359.

It is an arithmetic number, because the mean of its divisors is an integer number (19559304900).

Almost surely, 2^664804085435 is an apocalyptic number.

664804085435 is a deficient number, since it is larger than the sum of its proper divisors (274042549765).

664804085435 is a wasteful number, since it uses less digits than its factorization.

664804085435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67380 (or 67373 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 53.

The spelling of 664804085435 in words is "six hundred sixty-four billion, eight hundred four million, eighty-five thousand, four hundred thirty-five".