666464541630 has 32 divisors (see below), whose sum is σ = 1622043283968. Its totient is φ = 175220724000.

The previous prime is 666464541629. The next prime is 666464541647. The reversal of 666464541630 is 36145464666.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 156444946 + ... + 156449205.

It is an arithmetic number, because the mean of its divisors is an integer number (50688852624).

Almost surely, 2^666464541630 is an apocalyptic number.

666464541630 is an abundant number, since it is smaller than the sum of its proper divisors (955578742338).

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

666464541630 is a wasteful number, since it uses less digits than its factorization.

666464541630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312894232.

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 666464541630 in words is "six hundred sixty-six billion, four hundred sixty-four million, five hundred forty-one thousand, six hundred thirty".