664158880 has 384 divisors, whose sum is σ = 2118057984. Its totient is φ = 190771200.

The previous prime is 664158871. The next prime is 664158881. The reversal of 664158880 is 88851466.

It is a super-2 number, since 2×664158880² = 882214035765708800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664158880.

It is not an unprimeable number, because it can be changed into a prime (664158881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14131017 + ... + 14131063.

It is an arithmetic number, because the mean of its divisors is an integer number (5515776).

Almost surely, 2^664158880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664158880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059028992).

664158880 is an abundant number, since it is smaller than the sum of its proper divisors (1453899104).

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

664158880 is a wasteful number, since it uses less digits than its factorization.

664158880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 664158880 is about 25771.2801389454. The cubic root of 664158880 is about 872.4837116523.

The spelling of 664158880 in words is "six hundred sixty-four million, one hundred fifty-eight thousand, eight hundred eighty".