664085707998 has 16 divisors (see below), whose sum is σ = 1328196321936. Its totient is φ = 221357751680.

The previous prime is 664085707969. The next prime is 664085708051. The reversal of 664085707998 is 899707580466.

It is a super-3 number, since 3×664085707998³ (a number of 36 digits) contains 333 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, 681723 + ... + 1338998.

It is an arithmetic number, because the mean of its divisors is an integer number (83012270121).

Almost surely, 2^664085707998 is an apocalyptic number.

664085707998 is an abundant number, since it is smaller than the sum of its proper divisors (664110613938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664085707998 is a wasteful number, since it uses less digits than its factorization.

664085707998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075499.

The product of its (nonzero) digits is 182891520, while the sum is 69.

The spelling of 664085707998 in words is "six hundred sixty-four billion, eighty-five million, seven hundred seven thousand, nine hundred ninety-eight".