664797830 has 8 divisors (see below), whose sum is σ = 1196636112. Its totient is φ = 265919128.

The previous prime is 664797829. The next prime is 664797839. The reversal of 664797830 is 38797466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664797839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33239882 + ... + 33239901.

It is an arithmetic number, because the mean of its divisors is an integer number (149579514).

Almost surely, 2^664797830 is an apocalyptic number.

664797830 is a deficient number, since it is larger than the sum of its proper divisors (531838282).

664797830 is a wasteful number, since it uses less digits than its factorization.

664797830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66479790.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 664797830 is about 25783.6737103152. The cubic root of 664797830 is about 872.7634111883.

The spelling of 664797830 in words is "six hundred sixty-four million, seven hundred ninety-seven thousand, eight hundred thirty".