664733130 has 64 divisors (see below), whose sum is σ = 1657041408. Its totient is φ = 170533440.

The previous prime is 664733101. The next prime is 664733141. The reversal of 664733130 is 31337466.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 664733091 and 664733100.

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, 82585 + ... + 90275.

It is an arithmetic number, because the mean of its divisors is an integer number (25891272).

Almost surely, 2^664733130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664733130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828520704).

664733130 is an abundant number, since it is smaller than the sum of its proper divisors (992308278).

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

664733130 is a wasteful number, since it uses less digits than its factorization.

664733130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7811.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 664733130 is about 25782.4190098602. The cubic root of 664733130 is about 872.7350970041.

The spelling of 664733130 in words is "six hundred sixty-four million, seven hundred thirty-three thousand, one hundred thirty".