664827424740 has 36 divisors (see below), whose sum is σ = 2016643188924. Its totient is φ = 177287313216.

The previous prime is 664827424739. The next prime is 664827424753. The reversal of 664827424740 is 47424728466.

664827424740 is a `hidden beast` number, since 6 + 6 + 482 + 74 + 24 + 74 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 528715128384 + 136112296356 = 727128^2 + 368934^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 1846742667 + ... + 1846743026.

It is an arithmetic number, because the mean of its divisors is an integer number (56017866359).

Almost surely, 2^664827424740 is an apocalyptic number.

664827424740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664827424740 is an abundant number, since it is smaller than the sum of its proper divisors (1351815764184).

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

664827424740 is a wasteful number, since it uses less digits than its factorization.

664827424740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693485708 (or 3693485703 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 54.

The spelling of 664827424740 in words is "six hundred sixty-four billion, eight hundred twenty-seven million, four hundred twenty-four thousand, seven hundred forty".