664111000 has 64 divisors (see below), whose sum is σ = 1776041280. Its totient is φ = 227692800.

The previous prime is 664110983. The next prime is 664111027. The reversal of 664111000 is 111466.

It is a happy number.

664111000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40437 + ... + 54436.

It is an arithmetic number, because the mean of its divisors is an integer number (27750645).

Almost surely, 2^664111000 is an apocalyptic number.

It is an amenable number.

664111000 is an abundant number, since it is smaller than the sum of its proper divisors (1111930280).

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

664111000 is a wasteful number, since it uses less digits than its factorization.

664111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94901 (or 94887 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 664111000 is about 25770.3511811539. The cubic root of 664111000 is about 872.4627450205.

Adding to 664111000 its reverse (111466), we get a palindrome (664222466).

The spelling of 664111000 in words is "six hundred sixty-four million, one hundred eleven thousand".