664612234506 has 48 divisors (see below), whose sum is σ = 1571115132288. Its totient is φ = 201370276800.

The previous prime is 664612234439. The next prime is 664612234519. The reversal of 664612234506 is 605432216466.

It is a happy number.

664612234506 is a `hidden beast` number, since 6 + 6 + 4 + 612 + 23 + 4 + 5 + 0 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1256895 + ... + 1705581.

It is an arithmetic number, because the mean of its divisors is an integer number (32731565256).

Almost surely, 2^664612234506 is an apocalyptic number.

664612234506 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

664612234506 is an abundant number, since it is smaller than the sum of its proper divisors (906502897782).

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

664612234506 is a wasteful number, since it uses less digits than its factorization.

664612234506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456187 (or 456184 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 664612234506 in words is "six hundred sixty-four billion, six hundred twelve million, two hundred thirty-four thousand, five hundred six".