664165486 has 16 divisors (see below), whose sum is σ = 1055871936. Its totient is φ = 312246016.

The previous prime is 664165477. The next prime is 664165493. The reversal of 664165486 is 684561466.

It is a super-2 number, since 2×664165486² = 882231585587232392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28395 + ... + 46201.

It is an arithmetic number, because the mean of its divisors is an integer number (65991996).

Almost surely, 2^664165486 is an apocalyptic number.

664165486 is a deficient number, since it is larger than the sum of its proper divisors (391706450).

664165486 is a wasteful number, since it uses less digits than its factorization.

664165486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18923.

The product of its digits is 829440, while the sum is 46.

The square root of 664165486 is about 25771.4083045533. The cubic root of 664165486 is about 872.4866043378.

It can be divided in two parts, 6641 and 65486, that added together give a palindrome (72127).

The spelling of 664165486 in words is "six hundred sixty-four million, one hundred sixty-five thousand, four hundred eighty-six".