664540230 has 32 divisors (see below), whose sum is σ = 1601938944. Its totient is φ = 176428256.

The previous prime is 664540207. The next prime is 664540277. The reversal of 664540230 is 32045466.

It is a super-2 number, since 2×664540230² = 883227434576905800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41982 + ... + 55601.

It is an arithmetic number, because the mean of its divisors is an integer number (50060592).

Almost surely, 2^664540230 is an apocalyptic number.

664540230 is an abundant number, since it is smaller than the sum of its proper divisors (937398714).

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

664540230 is a wasteful number, since it uses less digits than its factorization.

664540230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97820.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 664540230 is about 25778.6778171418. The cubic root of 664540230 is about 872.6506686925.

Adding to 664540230 its reverse (32045466), we get a palindrome (696585696).

The spelling of 664540230 in words is "six hundred sixty-four million, five hundred forty thousand, two hundred thirty".