664104042 has 64 divisors (see below), whose sum is σ = 1693900800. Its totient is φ = 188924400.

The previous prime is 664104037. The next prime is 664104061. The reversal of 664104042 is 240401466.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 664103997 and 664104015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86667 + ... + 94017.

It is an arithmetic number, because the mean of its divisors is an integer number (26467200).

Almost surely, 2^664104042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664104042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846950400).

664104042 is an abundant number, since it is smaller than the sum of its proper divisors (1029796758).

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

664104042 is a wasteful number, since it uses less digits than its factorization.

664104042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7608 (or 7602 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 664104042 is about 25770.2161806998. The cubic root of 664104042 is about 872.4596980314.

The spelling of 664104042 in words is "six hundred sixty-four million, one hundred four thousand, forty-two".